It gets the job done

Some UX polishing could be done with respect to standardizing the inclusion/exclusion of directories.

2FA is great (and I enabled it); however requiring 2FA every time you start the application is a pain. If someone already compromised my machine and is logged in, accessing my backups doesn't give them anything they don't already have. I would prefer a feature to at least have it remember the 2FA login for a configurable day/week/month/whatever.

On balance, a good choice for cost, usability, and resource utilization on my machine.

As part of a 3-2-1 backup strategy on MacOS - (3 forms of backup, at least 2 different technologies, and at least 1 offsite), IDrive Online Backup and Object Storage e2 works great in tandem with my TimeMachine and DropBox backups. It backs up any mounted volumes. Archiving (for history vs. just the most recent copy) is, like TimeMachine, invaluable, as often you don't need the most recent copy (which might be bad) but a previous one. The interaction with DropBox wasn't perfect: my Documents and Downloads are DropBox monitored, which means that they are symbolic links to my DropBox folder. After the initial install, those links were NOT followed and so IDrive Online Backup and Object Storage e2 was not backing up those areas, which was not what I expected. Luckily I scrutinized the backup areas, and what was stored in the online web interface, and did a sample restore.

Also, I use Quicken for MacOS which stores my datafiles in my '~/Library/Application Support' directory; by default that area is NOT monitored by IDrive Online Backup and Object Storage e2 either. So my advice is: after the install configures its defaults, review it very carefully to make sure your data is covered properly.

Easy to install, easy to setup (other than my earlier gripes about the UX), easy to test. The shortcomings in monitored folders just requires diligence.