OneDrive vs MEGA: 3TB Storage, Zero-Knowledge Encryption and Safe Windows Migration

What happens, though, when your storage needs outgrow the entry tiers and you stop using Microsoft's productivity suite? That exact dilemma prompted software engineer and MakeUseOf contributor Alvin Wanjala to leave Microsoft's cloud ecosystem behind in favor of MEGA, a standalone storage provider built around client-side encryption. His migration highlights a very real pricing gap in Microsoft's consumer lineup, alongside critical technical and security trade-offs that every Windows user should weigh before moving terabytes of personal data across the web.

The Microsoft 365 Bundling Dilemma: Storage vs. Software​

To understand why a longtime Windows user would walk away from a deeply integrated service like OneDrive, you have to look at how Microsoft structures its consumer subscriptions. MakeUseOf's breakdown points out a stark divide between users who need an entire productivity suite and those who just want a digital warehouse for their files.

Right now, Microsoft's consumer cloud ladder looks like this:

• OneDrive Free: Includes 5 GB of cloud storage at no cost.
• Microsoft 365 Basic ($1.99/month): Offers 100 GB of OneDrive cloud storage, 100 GB of Outlook mailbox storage, and basic software perks, without the desktop Office applications.
• Microsoft 365 Personal ($9.99/month): Jumps to 1 TB of cloud storage and bundles the full desktop Office suite (Word, Excel, PowerPoint, Outlook, and OneNote), alongside Microsoft Defender, Copilot features, and premium support.

If you rely on the Office desktop apps every day—say, as a student or an independent consultant—getting those applications plus 1 TB of cloud space for $9.99 a month is a tough bargain to beat. However, once Wanjala graduated and stopped needing Microsoft's productivity software, that $9.99 monthly charge effectively became the price of 1 TB of raw storage alone. And if 100 GB on the $1.99 Basic tier isn't enough room for your photo libraries, code repositories, or video archives, Microsoft leaves you with no consumer middle ground: you buy the full software bundle or you look elsewhere.

Section Summary: Microsoft 365 Personal delivers strong value if you actively use Word, Excel, and its sibling apps, while Microsoft 365 Basic covers light users who need up to 100 GB. Users who need a terabyte or more of pure storage without bundled software often end up paying for features they never open.

Evaluating the Alternatives: Cost per Terabyte and Encryption​

When you strip away word processors and AI assistants and shop strictly on a price-per-terabyte basis, the cloud storage market looks very different. Wanjala evaluated major ecosystems like Google Drive, Dropbox, Box, and Apple's iCloud alongside privacy- and backup-focused competitors such as Sync.com, pCloud, IDrive, and Proton Drive, ultimately choosing MEGA based on raw capacity, cross-platform support, and privacy architecture.

Note on pricing: MEGA's subscription rates vary depending on regional localization and billing platforms. While Wanjala reported paying $11.69 per month (or $9.75 monthly when billed annually) for the 3 TB plan, MEGA's U.S. Apple App Store listing prices the 3 TB "PRO I Monthly" in-app subscription at $12.49 per month ($124.99 yearly). Always check direct checkout pricing in your currency before committing.

The Privacy Trade-Off: Zero-Knowledge Means Zero Safety Net​

Beyond offering four times the free storage (20 GB versus OneDrive's 5 GB) and roughly triple the capacity for a couple of dollars more per month on paid tiers, MEGA's headline differentiator is its security model.

OneDrive encrypts your files both in transit and at rest in Microsoft's data centers. However, because Microsoft manages the cryptographic keys—which enables web previews, Copilot integration, and automated policy scanning—the company technically retains the ability to access and scan stored content.

According to MEGA's official App Store documentation and client specifications, its platform uses client-side, zero-knowledge encryption: your files, chats, and media are encrypted and decrypted strictly on your local device before they ever touch MEGA's servers. Because the provider never possesses your keys, it cannot read your files—though Wanjala notes that files can be scanned if you generate public links to share them with others.

Before you rush to encrypt your digital life, consider the flip side of zero-knowledge architecture. If you forget your Microsoft account password, Microsoft can verify your identity and let you back into OneDrive. With a zero-knowledge service like MEGA, there is no corporate master key. As documented in MEGA's own web client warnings, losing both your account password and your exported Recovery Key means your encrypted files are permanently inaccessible. Furthermore, while MEGA publishes its client-side source code on GitHub for public review, switching to a zero-knowledge provider shifts the burden of disaster recovery squarely onto your shoulders. If you make the jump, exporting your recovery key and storing it in an encrypted password manager or offline safe is mandatory.

Section Summary: MEGA counters OneDrive's software bundle by offering 20 GB free and a 3 TB tier at roughly one-third the per-terabyte cost of Microsoft 365 Personal. Its zero-knowledge encryption keeps the provider out of your private files, but requires disciplined password and recovery-key management to avoid permanent data loss.

How to Migrate from OneDrive to MEGA Without Losing Files​

In his MakeUseOf piece, Wanjala outlines a straightforward browser-based workflow for moving an existing file library from OneDrive over to MEGA:

1. Sign in to your OneDrive account in a web browser and click My files in the left navigation pane.
2. Hover over the files or folders you want to move and click the selection checkmark on the left (Microsoft Support notes you can also click the circle at the top header row or press Ctrl + A to select everything inside a folder).
3. Click the Download button on the top command bar to save the selected items to your local computer.
4. Open a browser tab to MEGA's web portal, sign in, and select Cloud drive from the left sidebar.
5. Drag and drop your downloaded files and folders from your computer directly into the MEGA browser window, then click Upload in the confirmation prompt.
6. Install MEGA's desktop client afterward if you want automatic background folder syncing similar to OneDrive's desktop app.

Critical Microsoft Support Limits for Large Migrations​

While the browser drag-and-drop method works smoothly for modest document libraries, veteran Windows users with hundreds of gigabytes of data need to watch out for hard technical ceilings. According to Microsoft Support's official OneDrive download documentation, browser-based bulk downloads have strict constraints that can quietly trip up a weekend migration:

• The ZIP Archive Quirk: Whenever you select multiple files or folders in the OneDrive web interface and click Download, Microsoft bundles them into a single .zip archive. You must extract that archive locally before uploading if you want your normal folder tree inside MEGA rather than a giant compressed file. Also make sure your local drive downloads the archive to a directory outside your active OneDrive sync folder.
• File Size and Count Caps: OneDrive browser downloads are capped at a 250 GB maximum file size limit and a 10,000-file limit per folder or total download batch. If you are downloading multiple compressed files (such as .zip archives or .mp4 videos), Microsoft warns that the limit drops to 10 GB per .zip file and 20 GB overall.
• OneNote Notebooks Do Not Export as Files: You cannot batch-download OneNote notebooks through the standard OneDrive file selection. If a selected folder contains a OneNote notebook, the resulting .zip download will simply replace the notebook with a .txt error file.
• Encrypted Files Over 4 MB: Files protected by Microsoft sensitivity labels or Information Rights Management (IRM) that exceed 4 MB are automatically omitted from bulk .zip downloads and must be downloaded individually.
• Shared View Restrictions: You cannot directly bulk-download items from the "Shared" view in OneDrive; you must open them and save copies separately.

If you have a massive library nearing 1 TB, using the native Windows OneDrive sync client to set your folders to "Always keep on this device" is often much more reliable than pulling giant .zip bundles through a web browser. Once the files are physically resident on your local SSD or hard drive, you can point your new cloud provider's desktop client directly at those local directories or copy them over in manageable batches. Above all, verify folder counts, total byte sizes, and file integrity on the destination drive before deleting a single megabyte from your old OneDrive account.

Section Summary: Browser downloading and re-uploading works well for small transfers, but Microsoft enforces a 10,000-file cap, a 20 GB limit when bundling multiple .mp4 or .zip files, and special exclusions for OneNote notebooks and IRM-encrypted files. Large libraries are safer to migrate via local desktop sync folders and thorough post-transfer verification.

Which Cloud Strategy Makes Sense for Your PC?​

Walking away from OneDrive isn't a universal mandate—it's a math and workflow calculation. If your household lives in Word and Excel, uses OneNote across multiple devices, or fits comfortably inside the $1.99/month, 100 GB Microsoft 365 Basic plan, staying inside Microsoft's walled garden remains the most frictionless path on Windows 11.

On the other hand, if you are paying $9.99 every month strictly for a terabyte of digital closet space and value client-side encryption over deep Office integration, Wanjala's switch shows just how much further your budget can stretch with a dedicated storage provider—provided you respect OneDrive's export limits on the way out and lock down your encryption recovery keys on the way in.

Have you hit the wall with Microsoft 365's storage tiers, or does OneDrive's deep Windows integration keep you subscribed? Share your cloud backup setup and migration tips with the community in the WindowsForum storage threads below.