Online\cloud backup solution?

Question

Backup

Good afternoon, habralyud
I ask the community for help in choosing a solution for the Online backup solution.
Input data:
- The number of backup PCs - about 20.
- The amount of data: 20 computers - each has about 10 GB of information - a total of 200 GB
- It is highly desirable to manage your accounts from the general administrative.
— Was friendly to traffic — because. synchronized only the changed blocks of information and not stupid everything in a row
- Client under Win7, Ubuntu 10, Macos 10 I tend
to this option - www.idrive.com/compare-plans.htm - maybe someone can give feedback on using this service.
Thanks

Answer 1

I use spider oak for synchronization,
I buy one ak for 200 GB and put it on all computers with this ak (they allow it), in general, the backup is normal and only changes.
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Answer 2

I use duplicity and keep copies on Dropbox (duplicity also supports S3, ftp, samba, scp). Pluses - automatic encrypted (the password is written in the script) incremental (you can restore previous versions of files, and backups take up less space) copies.
Cons - not sure if duplicity works under Windows.
By the way, I recommend periodically trying to recover from a backup. Recently, a wave of articles ran through (on reddit, in particular) that a lot of people used various backup services, and when it came time to restore, the copies turned out to be inaccessible, broken, the restoration procedure was impossibly long and inconvenient, etc.