Content rating
Everyone
0+
Downloads
Content rating
Everyone
In-App Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

ountbay puts your servers and cloud storage in Android's Files app, so every app on your phone can open them like normal files.

Connect SFTP, FTP, WebDAV, SMB, Amazon S3, Google Drive, Dropbox, OneDrive and more than 90 services in all. Files download when you open them and upload when you save, so a huge folder takes no space on your phone until you need it.

CONNECT WHAT YOU ALREADY USE
• Servers and NAS drives: SFTP, FTP, FTPS, WebDAV and SMB
• Object storage: Amazon S3 and S3-compatible providers
• Cloud drives: Google Drive, Dropbox and Microsoft OneDrive

WORKS LIKE YOUR PHONE'S OWN STORAGE
• Your connections appear in the Files app
• Open a file in any app, edit it and save it back
• Browse, rename, create and delete from inside Mountbay too

UPLOADS YOU CAN TRUST
• Saved changes finish uploading even if the app closes or your connection drops
• If a file changed elsewhere while you were editing, both versions are kept
• If something needs your attention, Mountbay tells you and your changes stay safe on your phone

ADD FROM ANY APP
Tap Share, then Add to Mountbay, in Photos or any other app. Choose a connection and a folder, and you're done.

KEEP PRIVATE THINGS PRIVATE
Lock connections and folders with your fingerprint, face or screen lock. Locked items leave the Files app and open only in Mountbay.

YOUR PASSWORDS STAY WITH YOU
Passwords stay on your phone and go only to the service you connect. Google, Dropbox and Microsoft sign-in happens in your browser. Your files travel directly between your phone and your storage, with no Mountbay server in between.

FREE AND PAID
Free: set up as many connections as you like, browse them all in Mountbay, and keep one in the Files app.
Unlock once to put every connection in the Files app and set speed limits. One payment, no subscription.

Available in English, Chinese, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese and Spanish.
Your servers and cloud storage in the Files app, ready to open, edit and share.
Updated on
Nov 10, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location, Personal info and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

• Amazon S3, Cloudflare R2 and other object storage: folders with many files open much faster.
• Creating folders on Amazon S3 now works in every AWS region.
• Folders on object storage no longer show a false date of 1 January 2000.
• FTP: folders with square brackets in their names, such as "[Originals]", open again.
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
BACKROOM STUDIO LTD
backroomstudioltd@gmail.com
Flat 402 Dunlip House 2 William Murdoch Road LONDON E14 0YH United Kingdom
+44 7471 455149

More by Backroom Studio Ltd