I’ve also had an issue with Snapshot Backup causing havoc on the server my sites are on. It wasn’t that it was backing up every 2 minutes. (I had it set to backup every week or every 2 weeks for some sites, based on update usage. The “every 2 minutes” backup on one site took the server down the first time.)
The problem was – although I was storing the files via FTP to a directory above the directories I was backing up, it seemed to be compounding the size of the archive with each backup. (I’m guessing because it stores the file within the wp-content/uploads directory?) I noticed this compounding size increase even with sites I had let go dormant for months, so I know it’s not that my clients were being prolific or uploading ridiculously sized images.
In any case, my host (BlueHost) shut all 35 of my sites down due to this memory hog issue. Instead of having a file sum total of 3GB, my public_html directory was 20GB! So, I will not be using or recommending this plugin at this point. I’m back to WordPress Backup, which only backs up the Plugins/Uploads and current Theme folder.
I really wanted this to be my backup plugin of choice… and it was, until it took my sites down… twice within the past 6 months.