Step-by-Step Guide: Building a OneDrive Clone with Adalo

Building a OneDrive clone requires solving complex technical challenges that typically demand months of development time and specialized engineering talent. From secure file uploads and folder hierarchies to sharing permissions and cross-device synchronization, cloud storage apps involve intricate backend infrastructure that puts them beyond reach for most teams without deep coding expertise and substantial budgets.

This is exactly what makes Adalo the ideal platform for bringing your cloud storage vision to life without writing a single line of code. Adalo is a no-code app builder for database-driven web apps and native iOS and Android apps—one version across all three platforms. AI-assisted building and streamlined publishing enable launch to the Apple App Store and Google Play in days rather than months.

How Adalo Makes Cloud Storage App Development Accessible

Adalo is a no-code app builder for database-driven web apps and native iOS and Android apps—one version across all three platforms, published to the Apple App Store and Google Play. This unified approach is essential for cloud storage applications, where users expect to access their files seamlessly whether they're on their phone, tablet, or desktop computer.

App store distribution transforms your OneDrive clone from a simple web tool into a professional-grade storage solution. With native apps, you can send push notifications when colleagues share files, enable offline access to important documents, and deliver the responsive, polished experience users associate with established platforms like Dropbox and Google Drive.

Building a cloud storage app like OneDrive typically demands extensive backend infrastructure, complex file management systems, and native development expertise across multiple platforms—a combination that puts the project out of reach for most teams without significant engineering resources and months of development time. Users expect seamless file uploads, folder organization, sharing permissions, storage quotas, and cross-device synchronization, each feature adding layers of technical complexity that traditionally require deep coding knowledge to implement properly.

Adalo, an AI-powered app builder, eliminates these barriers entirely, making sophisticated file-sharing applications accessible to builders of any skill level. The platform creates database-driven web apps and native iOS and Android apps from a single codebase—one version across all three platforms. AI-assisted building and streamlined publishing enable launch to the Apple App Store and Google Play in days rather than months.

Why Adalo Works for Building a Cloud Storage App

Cloud storage apps thrive on accessibility and real-time engagement across devices. Users expect seamless file access on their phones, tablets, and desktops without switching between different applications. Adalo's cross-platform publishing delivers exactly this—one build publishes to web, iOS App Store, and Android Play Store simultaneously.

With native app store publishing, you can deliver push notifications when files are shared, keep users connected to their documents wherever they go, and provide the polished, professional experience they expect from established storage platforms. The platform's modular infrastructure scales to serve apps with millions of MAU, with no upper ceiling—critical for storage apps that can grow rapidly as users accumulate files.

Ada, Adalo's AI builder, lets you describe what you want and generates your app. Magic Start creates complete app foundations from a description, while Magic Add adds features through natural language.

This comprehensive tutorial walks you through building a functional cloud storage and file-sharing app. You'll create a working app with secure uploads, folders, sharing/permissions, search, quotas, and cross-device access—all without writing code.

Prerequisites & Initial Setup

Step 1: Create Your Adalo Account and App

1. Visit Adalo.com and sign up.
2. Click Create New App in the dashboard.
3. Choose Mobile App (recommended for storage apps) or Web App.
4. Name your app (e.g., CloudDrive, FileSync).
5. Select Start from Scratch, or use Magic Start to generate a foundation from a description like "cloud storage app with file sharing and folder organization."
6. (When you're ready to publish) review current plan details: Adalo pricing—plans start at $36/month with unlimited usage and no record caps.

Step 2: Configure Your App Theme

1. Select a primary color (brand color or professional blue).
2. Choose a secondary color for actions/CTAs.
3. Pick a clean font (e.g., Inter/Roboto/Open Sans).
4. Click Continue to enter the builder.

Step 3: Get Oriented in the Builder

• Left sidebar: Database, Screens, Components, Marketplace
• Canvas: Visual editor—can display up to 400 screens at once for complex apps
• Right panel: Properties & styling
• Top bar: Preview, Publish, Settings

Building the Database Structure

We'll create Users, Files, Folders, and Shared Links collections (plus relationships). With Adalo 3.0's overhauled backend infrastructure, paid plans have no database record limits—your storage app can scale to millions of files without hitting caps. For massive capacity or special compliance requirements, keep metadata in Adalo and store binaries externally via External Collections/Custom Actions.

Step 4: Enhance the Users Collection

1. Open Database → Users.
2. Add properties:

• Profile Image (Image)
• Phone Number (Text)
• Storage Used (Number)
• Storage Limit (Number)
• Account Type (Text: "Free", "Starter", "Pro")
• Subscription Status (Text: "Active", "Expired", "Trial")
• Last Login (Date & Time)
• Account Created (Date & Time – Automatic)

Step 5: Create the Files Collection

1. + Add Collection → Files.
2. Add properties:

• File Name (Text)
• File (File) – actual upload
• File Type (Text)
• File Size (Number)
• Upload Date (Date & Time – Automatic)
• Modified Date (Date & Time)
• Is Deleted (True/False)
• Deleted Date (Date & Time)
• Download Count (Number)
• Is Starred (True/False)
• Description (Text)
• Thumbnail (Image)

Step 6: Create the Folders Collection

1. + Add Collection → Folders.
2. Add properties:

• Folder Name (Text)
• Created Date (Date & Time – Automatic)
• Is Deleted (True/False)
• Color Tag (Text)
• Is Starred (True/False)
• (Optional) Sort Order (Number)

Step 7: Create the Shared Links Collection

1. + Add Collection → Shared Links.
2. Add properties:

• Link ID (Text – unique token)
• Permission Level (Text: "View Only", "Can Download", "Can Edit")
• Expiration Date (Date & Time – optional)
• Is Active (True/False)
• Password Protected (True/False)
• Access Password (Text – optional)
• Access Count (Number)
• Created Date (Date & Time – Automatic)

Step 8: Define Relationships

• Users ↔ Files: User has many Files (Owner); File belongs to Owner
• Users ↔ Folders: User has many Folders; Folder belongs to Owner
• Folders (self-reference): Parent Folder for nesting; Folder has many Files
• Files ↔ Shared Links: File has many Shared Links
• Shared Links ↔ Users: Shared By (creator)

Data modeling tips: Database basics

Creating Authentication

Step 9: Build the Welcome Screen

1. Rename default screen to Welcome.
2. Add logo, headline ("Your files, organized"), and subtitle.
3. Buttons: Get Started → Sign Up, I already have an account → Login.

Step 10: Create the Sign Up Screen

1. + Add Screen → Sign Up.
2. Add a Form (Users) → Create Account (Email, Password, optional Display Name).
3. On submit → Link to Dashboard.
4. Footer link: "Already have an account? Log in".

Step 11: Create the Login Screen

1. + Add Screen → Login.
2. Add a Form (Users) → Login (Email, Password).
3. On submit → Link to Dashboard.
4. Footer link to Sign Up.

Designing Core Screens

Step 12: Create the Home (Dashboard)

1. + Add Screen → Dashboard.
2. Top bar: app name/logo, profile (→ Settings), menu.
3. Storage card: progress bar + text "{Used}/{Limit} used".
4. Quick actions: Upload File, Create Folder, Recent Files.

Step 13: Add Lists

• Folders list: Owner = Logged In User; not deleted; tap → Folder Contents.
• Files list (root): Owner = Logged In User and Parent Folder empty; sort Modified Date (desc); tap → File Details.

Step 14: Upload Screen

• + Add Screen → Upload File.
• Form (Files): File picker, File Name, Folder Location, Description, Add to Starred.
• On submit: Create File → Update User (Storage Used += File Size) → Link back.

Folder & File Features

Step 15: Build the Folder View

1. + Add Screen → Folder Contents (expects a Folder).
2. Show name/breadcrumbs; actions: New Folder, Upload, Share Folder.
3. Lists: Subfolders (Parent = Current) and Files (Parent Folder = Current).

Step 16: Build the File Details

1. + Add Screen → File Details (expects a File).
2. Show preview/icon, name, type, size, dates, description, starred.
3. Actions: Open/Preview, Share, Move, Rename, Download, Delete (soft-delete).

Uploads, Validation, and Quotas

Step 17: Create the Upload Flow

• Spinner + "Uploading…" while submitting; toast on success.
• Validate type/size; show "Not enough storage" modal if quota exceeded.
• Security best practices (OWASP File Upload): https://cheatsheetseries.owasp.org/cheatsheets/File_Upload_Cheat_Sheet.html

Step 18: Track Storage Quotas

1. After create, Update Logged In User → Storage Used += File Size.
2. If (Storage Used + File Size) > Storage Limit: block upload; show Upgrade / Free up space.
3. For external storage (S3/GCS/etc.), connect via Custom Actions / External Collections.

Step 19: File Type Restrictions (Example)

• Docs: PDF/DOC/DOCX/TXT
• Images: JPG/PNG/GIF
• Videos: MP4/MOV
• Use conditional visibility to disable Upload if unsupported.

Step 20: Show Upload Feedback (Approximate)

• Loading indicator on submit; optional timer/heartbeat.
• Navigate after record creation.

Creating & Managing Folders

Step 21: Create Folder Screen

1. + Add Screen → Create Folder (optional Parent Folder).
2. Form (Folders): Folder Name, Color Tag.
3. On submit: set Owner, Parent Folder (if passed), then return.

Step 22: Move Files Between Folders

1. + Add Screen → Move File (expects a File).
2. Show user's folders (tree/indented).
3. Move Here → set Current File → Parent Folder = selected.

Step 23: Bulk Actions

• Add Select Multiple toggle on lists.
• Bottom bar: Move, Delete, Share.

Sharing & Permissions

Step 24: Share File Screen

1. + Add Screen → Share File (expects a File).
2. Form (Shared Links): Permission Level, Expiration Date, Password Protected (→ Access Password).
3. On submit: create Shared Link (Link ID), show/copy URL, toast.

Step 25: Public Link Handling

1. Create View Shared File (public) with Link ID URL param.
2. Validate link active/not expired; handle password if required.
3. Show preview and permitted actions; increment Access Count.

Step 26: Share Folders & Manage Access

1. Add Share Folder (mirrors file sharing).
2. Revoke Access → set Shared Link Is Active = False.
3. Optional Activity Log (viewed/downloaded/edited entries per file).

Step 27: "Shared with Me" View

• On Dashboard, add Shared with Me section.
• Files with an active Shared Link or explicit share to the user.

External Storage with Xano (Optional)

Step 28: When to Use External Storage

• Need storage beyond current plan, very large files, or server-side processing.

Step 29: Set Up Xano

1. Create a Xano account.
2. Build tables/endpoints for upload/get/delete (optionally direct-to-S3/GCS).
3. In Adalo, connect via External Collections (auth as needed).

Step 30: Wire APIs into Adalo

1. Use External Collections for list/detail views.
2. Custom Actions for uploads/signed URLs.
3. Store binary externally; keep metadata in Adalo.
4. Note: external services have separate pricing/limits.

Search & Recent Files

Step 31: Build Search

1. + Add Screen → Search.
2. Add a Text Input that updates a Search Query value.
3. Lists:

• Files where Owner = user, File Name contains Search Query
• Folders where Owner = user, Folder Name contains Search Query

4. Tap navigates to File Details or Folder Contents.

Step 32: Advanced Filters

• File Type, Date Range, Size Range, Sort By (Name/Date/Size).
• Combine with AND logic; update dynamically.

Step 33: Recent Files

• + Add Screen → Recent Files (Owner = user; sort Modified/Upload desc; limit 20).

Profile, Trash, and Preview

Step 34: Profile & Settings

• + Add Screen → Settings/Profile with avatar, email, plan, storage usage.
• Manage subscription/payment (if implemented).
• Learn publishing: Overview

Step 35: Trash (Soft Delete)

• On delete: set Is Deleted = true and Deleted Date = now.
• Exclude from normal lists; add Trash screen for restore/permanent delete.
• Auto-purge (e.g., 30 days) via automations or external tools.

Step 36: File Preview

• Images: Image component (source = File).
• PDFs: PDF viewer from Marketplace or WebView.
• Others: show icon + metadata; offer Download.

Testing Your App

Step 37: Seed Test Data

• Create multiple test users; upload mixed file types/sizes; nested folders; share links.
• Performance guidance: Optimize performance

Step 38: Core Workflow Tests

• New user: sign up → upload → create folder.
• Daily use: upload → move/rename → star → delete/restore.
• Sharing: link + incognito test; verify permissions/revocation.

Step 39: Edge Cases

• Quota exceeded, large files, slow/unstable networks, special filenames, interrupted uploads.

Step 40: Performance

• Test 100+ files; measure list/search latency; paginate/virtualize as needed; consider external storage for heavy media.
• Adalo 3.0's infrastructure is 3-4x faster than previous versions, handling large file lists efficiently.

Publishing

Step 41: Prepare for Web

• Settings → Publishing.
• Free: Adalo subdomain. Paid: custom domain + DNS/SSL — Pricing starts at $36/month
• Set SEO: title/description/favicon/social image.

Step 42: Publish to Web

• Publish → Web; verify responsive layouts and core flows across devices.
• Manual control & rebuilds: Publishing overview

Step 43: Prepare for App Stores

iOS (Apple App Store):

1. Enroll in the Apple Developer Program ($99/year).
2. Create the app in App Store Connect; upload assets/screenshots (verify current sizes).
3. In Adalo: set iOS icons/splash; generate build; submit. (Review times vary.)

Android (Google Play):

1. Create a Google Play Developer account (one-time $25).
2. Prepare listing; in Adalo set Android assets; generate AAB; upload to Play Console. (Review times vary.)

Unlike platforms that wrap web apps for mobile, Adalo compiles to true native code—your cloud storage app performs like apps built with traditional development, with unlimited updates once published.

Monetization (Optional)

Step 44: Subscriptions with Stripe

1. Create plan tiers in your DB (Free/Starter/Pro/Business) with storage limits/features.
2. Install Stripe from the Marketplace.
3. Build Pricing/Checkout screens (subscription mode).
4. On success: update Account Type and Storage Limit; store subscription ID.

• U.S. card fees commonly start around ~2.9% + $0.30 — Stripe pricing

Step 45: Premium Features

Password-protected links, advanced permissions, larger quotas, version history, extended trash retention, priority support, team features.

Advanced Enhancements

Step 46: Activity & Version Control

• Activity Log (Viewed/Downloaded/Edited + timestamps).
• File Versions collection; on replacement upload, create a version record and update main file.

Step 47: Teams & Orgs (Optional)

• Organizations and Team Members (roles: Admin/Member/Viewer).
• Org folders, audit logs, seat-based billing (server-side webhooks).

Step 48: Mobile-Focused Add-ons

• Manual Photo backup ("Sync Photos" flow), Offline access (Keep offline), push notifications for shares/updates/storage alerts.

Step 49: Server-Side Processing

• Thumbnails, conversions (e.g., to PDF), antivirus scanning on upload.
• Wire via Custom Actions to your API; return signed URLs.

Why Adalo Works Well for File Storage

• Built-in relational DB with no record limits: Users ↔ Files ↔ Folders ↔ Shared Links scale without caps — Database basics
• Cross-platform publishing: iOS, Android, and web from one codebase — Publishing
• Marketplace components: uploaders, lists, viewers — Marketplace
• Integrations: payments/backends/APIs — Integrations
• X-Ray performance monitoring: Identifies issues before they affect users as your storage app scales

Cost & Resources

• Adalo: Plans start at $36/month with unlimited usage, no record caps, and unlimited app store updates — https://www.adalo.com/pricing
• Stripe fees: vary by region/method; U.S. online cards commonly start around ~2.9% + $0.30 — https://stripe.com/pricing
• Developer programs: Apple $99/year — https://developer.apple.com/programs/ · Google Play $25 one-time — https://support.google.com/googleplay/android-developer/answer/6112435
• OWASP File Upload — https://cheatsheetseries.owasp.org/cheatsheets/File_Upload_Cheat_Sheet.html
• Adalo Publishing Overview — https://www.adalo.com/features/publishing
• Adalo Integrations (Xano, Stripe, etc.) — https://www.adalo.com/integrations
• Adalo Database Basics — https://www.adalo.com/posts/database-basics-for-building-a-mobile-app

Additional Resources

• Adalo Help Center — https://help.adalo.com/
• Adalo Marketplace — https://www.adalo.com/marketplace
• External Collections — https://help.adalo.com/integrations/external-collections-with-apis
• Custom Actions — https://help.adalo.com/integrations/custom-actions
• Optimize Performance — https://help.adalo.com/performance/optimize-app-performance
• Xano Integration — https://www.adalo.com/integrations/xano
• Airtable Integration — https://www.adalo.com/integrations/airtable
• AWS S3 — https://aws.amazon.com/s3/
• Google Cloud Storage — https://cloud.google.com/storage

Note: This OneDrive-style build is a prototype using Adalo's UI and database. For very large files, robust offline/background sync, signed URL flows, and enterprise compliance, connect external services (e.g., Xano, Amazon S3, Google Cloud Storage) via External Collections / Custom Actions and handle heavy processing server-side. Always test on real devices and review your privacy posture (e.g., GDPR/CCPA) before publishing.

FAQ

Why choose Adalo over other app building solutions?

Adalo is an AI-powered app builder that creates true native iOS and Android apps. Unlike web wrappers, it compiles to native code and publishes directly to both the Apple App Store and Google Play Store from a single codebase—the hardest part of launching an app handled automatically. Paid plans include unlimited database records and no usage-based charges, so your costs stay predictable as your app grows.

What's the fastest way to build and publish an app to the App Store?

Adalo's drag-and-drop interface and AI-assisted building let you go from idea to published app in days rather than months. Magic Start generates complete app foundations from descriptions, and the platform handles the complex App Store submission process—certificates, provisioning profiles, and store guidelines—so you can focus on features and user experience.

Can I easily build a cloud storage app without coding?

Yes, Adalo provides a visual drag-and-drop interface for creating database structures, user authentication, file uploads, folder management, and sharing features—all the core functionality you'd expect from a OneDrive-style app. Over 3 million apps have been created on the platform, with the visual builder described as "easy as PowerPoint."

How do I handle storage quotas and file size limits in my cloud storage app?

Track storage quotas by adding Storage Used and Storage Limit properties to your Users collection. When a user uploads a file, use an action to update their Storage Used value, and implement conditional logic to block uploads when they exceed their limit. Display a progress bar on the dashboard showing usage and prompt users to upgrade or free up space.

Can I add file sharing with permissions and expiration dates?

Yes, Adalo supports creating shareable links with customizable permissions like View Only, Can Download, or Can Edit. You can set expiration dates, password protection, and track access counts by creating a Shared Links collection with the appropriate properties. Public link screens can validate these settings before granting access.

What if I need more storage capacity than Adalo provides?

For large-scale storage needs, connect Adalo to external services like Xano, Amazon S3, or Google Cloud Storage using External Collections and Custom Actions. This approach keeps your file metadata in Adalo while storing the actual files externally, giving you virtually unlimited storage capacity and server-side processing capabilities.

How do I implement a trash/recycle bin feature for deleted files?

Implement soft delete by adding Is Deleted and Deleted Date properties to your Files collection. When users delete a file, set Is Deleted to true rather than permanently removing it. Create a separate Trash screen that lists deleted files and offers restore or permanent delete options, and use automations to auto-purge items after 30 days.

How much does it cost to build a cloud storage app with Adalo?

Adalo plans start at $36/month with unlimited usage and no database record caps. You'll also need an Apple Developer Program membership ($99/year) for iOS publishing and a Google Play Developer account ($25 one-time) for Android. Unlike some platforms with usage-based charges, Adalo's pricing stays predictable—no bill shock as your user base grows.

Can my cloud storage app scale to handle many users?

Yes. Adalo 3.0's modular infrastructure scales to serve apps with over 1 million monthly active users, with no upper ceiling. The platform is 3-4x faster than previous versions, and X-Ray monitoring identifies performance issues before they affect users. With proper data relationship setups, your storage app can grow without hitting platform limits.

Do I need coding experience to build a cloud storage app?

No coding experience required. Adalo's visual builder lets you create database structures, design screens, and configure logic through drag-and-drop. Magic Add lets you describe features in natural language and have them added automatically. The platform handles the technical complexity of native app compilation and store publishing.