Wikipedia
SugarSync is a cloud service that enables active synchronization of files across computers and other devices for file backup, access, syncing, and sharing from a variety of operating systems, such as Android, iOS, Mac OS X, and Windows devices. For Linux, only a discontinued unofficial third-party client is available.
The program automatically refreshes its sync by constantly monitoring changes to files—additions, deletions, edits—and syncs these changes with the SugarSync servers. Any other linked devices then also sync with the SugarSync servers. Deleted files are archived in a "Deleted Files" folder. The files are not actually deleted until the user does so manually.
Originally offering a free 5 GB plan and several paid plans, the company transitioned to a paid-only model on February 8, 2014. Under the new model, the company offered temporary promotional pricing and encouraged subscribers to use subscription auto-renewal. However the auto-renewal takes place at the non-promotional rate and no refunds are allowed through the new model. Moreover, if the account cannot be auto-renewed due to expiration of a credit card or some other change in payment terms, the account is automatically cancelled and the data deleted from the company's servers at the same time the account is cancelled. If emailed warnings are not received SugarSync will delete a company's entire cloud-computing storage account.
Sugarsync was acquired by J2 Global in March 2015.