Dropbox is a cloud storage service where you can backup photos, videos and files. If you are using the 'Dropbox Desktop Application', then your photos, videos and files are backed up several times. The first copy of your file is save on your computer's hard drive and then synced to your Dropbox account online, and that copy is backed up again for safety. If you are using Dropbox to sync files between multiple computers, then your files are backed up on those computers as well. If you delete your photos, videos or files from Dropbox, then by default it saves a history of all deleted files for 30 days. This facility is available for all Dropbox users. You can purchase the 'Extended Version History' add-on feature to recover the deleted files at any time within a year of an edit or deletion made after your purchase. Dropbox saves your all online files in encrypted format and in secure storage servers across several data centers.