Online Backup Systems Question About Online Computer Backup. Do I Need To Backup My Entire C-drive?

Question about online Computer Backup. Do I need to backup my entire c-drive? - online backup systems

I use a backup system online. I try to think it is terrible, and he advised me that if you try, my drive "C" simply impossible, due to data protection.

I receive many error messages and I think we should look for another program.