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Cloud Storage Face-Off: Which App Deserves Your Files?
Google Drive leads on ratings and reach, while MEGA and S3Drive make stronger privacy cases for files you would rather keep private.
Quick Picks
Best overall: Google Drive for the strongest mix of rating, popularity and everyday file tools.
Best for privacy: S3Drive for client-side encryption across S3, WebDAV and Rclone storage.
Best free allowance: MobiDrive if the advertised 20GB free tier matters more than a huge review history.
The safest starting points for everyday files
The ratings tell a useful story before the feature lists do. Google Drive, Dropbox and Box all sit at 4.7 stars on the Australian App Store, but their review counts are wildly different: Google Drive has 464,000 ratings, Dropbox has 69,000 and Box has 6,300. That gap matters because a large review base gives you more evidence than a near-identical score with a much smaller sample.
For a general productivity setup, I would start with Google Drive. It combines cloud storage with a file scanner, and its App Store listing places it at No. 12 in Productivity. Dropbox remains the cleaner alternative for people who mainly move and share files, while Box makes more sense in work environments where content management matters more than casual photo backup.
Google Drive
Google Drive has the strongest public track record in this group: 4.7 stars from 464,000 Australian App Store ratings, a No. 12 Productivity ranking and a built-in file scanner. It is the pick I would hand to someone who wants one familiar place for documents, scans and shared files rather than a specialist privacy tool. The free download is backed by in-app purchases, so the app itself costs nothing to install, but the listing does not provide a storage allowance here. That missing figure is the first thing to check before moving a large photo library. Compared with Dropbox, Drive has far more review evidence and broader everyday utility; compared with S3Drive, it is much easier for a mainstream household but less focused on client-side encryption.
Dropbox
Dropbox is the simpler file-transfer proposition, with sharing photos and storing files stated directly in its App Store description. Its 4.7 rating from 69,000 reviews is credible, though it has less public feedback than Google Drive. The 13+ age rating also makes it a slightly less universal family recommendation than Drive's 4+ listing. Dropbox is the better fit for someone who already works across shared folders and wants a focused file service rather than Google's broader scanner-and-document ecosystem. The free install still comes with in-app purchases, and the supplied listing does not state the free storage limit, so do not choose it on price alone.
Box
Box earns its place through a more business-facing angle: the listing calls it intelligent content management and includes AI in the product name. Its 4.7 score matches Drive and Dropbox, but only 6,300 ratings support it, so the signal is thinner. I would reserve Box for work files, controlled sharing and teams that need content organised as a managed library. It is less persuasive as a casual personal backup app because the supplied data says little about consumer storage limits or photo workflows. Compared with Drive, Box feels more specialised; compared with Dropbox, it asks you to care more about content management than simple transfers.
The first group wins on familiarity, but none of the three gives a clear storage allowance in the supplied listings. That makes the free label incomplete for anyone with a large camera roll. Privacy-focused services take a different route: they explain where encryption happens and which storage systems they can connect to.
Privacy-first storage with more control
Cloud storage is not one thing. Some apps sell convenience around a managed service; others give you more control over encryption, storage back ends or sharing. S3Drive and MEGA belong in the second camp, although they are not equally approachable.
S3Drive
S3Drive is the most technically distinctive find here. It encrypts files before they leave the device and supports S3, WebDAV and Rclone-compatible back ends, so the service is not tied to one storage provider. The feature list also includes Drive mount and Files integration, multiple sync modes, encrypted filenames, background photo and video backup and encrypted sharing links. That is a serious toolkit for a privacy-conscious user who already understands storage accounts. The price of that control is setup complexity: the app does not present a simple all-in-one storage allowance in the supplied description. Pick it for encryption and flexibility, not for the easiest first-run experience.
Google Drive
The Android version of Google Drive matters because platform choice changes the comparison. It gives Android users the same familiar Drive ecosystem rather than forcing a separate storage workflow, and the listing identifies Google LLC as the developer. There is no rating or storage figure in the supplied Android extract, so I would not treat this entry as evidence of a better deal than the iOS listing. It is the practical pick for an Android user already using Google services, especially if cross-device access matters more than encryption architecture. S3Drive remains the stronger privacy choice; Drive remains the easier daily driver.
Microsoft OneDrive
OneDrive is the most explicit about storage tiers in the supplied description: 5GB free, 1TB with Personal and 2TB shared across up to six people with Family. It also lists offline access, camera upload, a secure photo locker and automatic tagging. That makes it more useful for a household already paying for Microsoft's ecosystem than for someone who simply wants a free drive. The privacy story is framed around encrypted storage, but the description does not make the same client-side encryption claim as S3Drive or MEGA. Compared with Google Drive, OneDrive gives clearer stated capacity; compared with MobiDrive, it offers a more recognisable family-storage structure but only 5GB at the free level.
Control is valuable, but it can bring setup work. OneDrive sits between the two camps: clearer storage tiers and strong photo tools, without the specialist configuration of S3Drive. The remaining picks are for readers who care most about privacy claims or a large advertised free allowance.
Free space and the privacy wildcard
Free storage numbers look attractive until you ask what else is known. MobiDrive advertises 20GB at sign-in and zero ads, while MEGA leads with user-controlled encryption. I would not rank either on capacity alone; the quality of the sync, sharing and recovery experience matters just as much.
Dropbox
MobiDrive advertises 20GB free after sign-in, with zero ads and cross-platform access, which gives it the clearest free-space pitch in this comparison. It also lists backup, sync and secure content transfer across file formats, devices and platforms. That is compelling beside OneDrive's stated 5GB free tier, but the supplied description provides no rating count or independent evidence of how the free plan behaves under heavy use. I would test sharing and restore before making it the only home for irreplaceable files. Choose it for the generous starting allowance and ad-free positioning; choose Drive or Dropbox for the reassurance of a much larger public review history.
MEGA
MEGA is the privacy wildcard, describing storage that is encrypted and decrypted only on client devices rather than by the provider. The Android listing also covers uploading, searching, downloading, streaming, sharing folders and real-time updates. That is a stronger privacy explanation than the mainstream services provide in the supplied data, but the extract does not state a free capacity, price or rating. I would choose MEGA for users who put provider access below convenience on the priority list. For a family that mainly wants effortless shared photos, Google Drive or OneDrive is easier to justify.
One app remains, and it is the clearest example of why ratings need context. Icedrive has a secure-storage positioning, but its Australian App Store listing shows only 2 ratings and 2.5 stars. That is not enough evidence to dismiss the service forever, yet it is far too little reassurance for a primary backup.
The one I would wait on
New or lightly reviewed apps can improve quickly, but your files are not a good place to gamble. Icedrive may appeal to someone who wants to test a newer iPad-oriented cloud storage client, especially because the listing says it is designed for iPad. The same listing says it is not verified for macOS, and the two-review sample is a major warning beside Google Drive's 464,000 ratings.
Icedrive
Icedrive is the contrarian pick: the secure-cloud-storage pitch sounds promising, but the Australian App Store evidence is weak at 2.5 stars from just 2 ratings. It is designed for iPad and is not verified for macOS, which narrows its appeal for anyone moving between Apple devices and a computer. That does not prove the service is poor; it proves the listing has not earned enough trust yet. I would trial it with non-critical files, not use it as the only backup. Google Drive, Dropbox and OneDrive all have far stronger public evidence.
Which cloud storage app should you download?
Pick Google Drive if you want the safest all-round recommendation, a built-in scanner and the strongest review evidence. Choose Dropbox if file sharing is the main job and you prefer a focused service. Use Box for managed work content rather than casual personal storage.
Choose S3Drive if client-side encryption, encrypted filenames and support for your own storage back ends matter more than simplicity. MEGA is the privacy-led alternative with a clearer end-to-end encryption explanation. OneDrive makes the most sense for Microsoft households that want 1TB Personal or 2TB shared Family storage, while MobiDrive has the strongest advertised free allowance at 20GB.
I would keep Icedrive in the testing pile until its Australian rating base grows. The hunt is not finished after choosing storage: your email workflow affects how quickly those files become useful. Continue with The Email Apps Worth Downloading on iPhone and Android for the next productivity shortlist.