Dropbox has just provided another reminder not to place complete faith in cloud storage, having allowed a bug to delete some users’ files.

The bug was tied to Dropbox’s Selective Sync feature, which helps users save space by only downloading selected folders to local storage, Engadget reports. In earlier versions of Dropbox’s desktop software, the bug could delete files if users restarted or shut down their machines while Selective Sync was in progress.

Dropbox says the glitch affected “a small number” of people using out-of-date versions of Dropbox’s desktop software. The company has been sending letters to these users, and providing personalized web pages showing which files Dropbox was able to restore. Affected users are also getting a year of Dropbox Pro service for their troubles.

To read this article in full or to leave a comment, please click here