Dropbox

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Dropbox allows users to connect to the file hosting service with the same name, enabling users to upload and download any file they want. Read more about Dropbox  

There are lots of file hosting services out there, and Dropbox is one of the best. Unlike the versions for the PC, the mobile version doesn’t download anything by default and requires users to make that choice.
 
It’s possible to set up the Dropbox app to back up photos and videos automatically, to send large files to other users without the use of email, or to send a link to the specific file in the storage.
 
The application is also available in the sharing menu for various other apps in the Android system, so you can always use it to back up important files.