I don't see the problem to be honest. It's usual for someone to have a 1tb ssd system drive that may have a few of their favourite games installed on also.
I've probably got 800gb filled of my system drive. I used to back it up using MR without problems. Why is it a problem now?
I've seen fixes this year for MR that suggest could have been the problem for the OP. because I'm having the same problem though may suggest they aren't completely fixed though. I'm gonna have to raise a ticket and waste lots of time solving this.

Just because you may be getting the same error message as OP doesn't mean that you have "the same issue".  I would suggest starting your own thread, and actually posting some information relevant to your case (starting with a copy of a log file, minus the license code at the bottom of the log, as well as information about your set-up).

                                

@Steveyg777 Hi Steve, I never did receive feedback that seemed like a solution from Macrium support. That said, my workaround of dividing the backup of the whole drive into two backups for roughly half of the drive contents seems to be working fine. My suspicion is that if you are using a spanned drive as your backup location, the backup file must all fit on one drive within that span or it fails.

But I don't really have a way to confirm it, and since the workaround results in that backups I need I've moved on to other questions. Like where to find a good job as a Project Manager for tech projects that has decent benefits and work/life balance. Little things like that :-)

Good luck, I hope you get your issue sorted out.

April

@Steveyg777, I agree with @JK, start your own thread stating your specific configuration and log file.
The original of this thread pertained to a NAS setup; is yours?
There was also a comment from Macrium that the error pointed to a possible Disk Quota issue, not physical disk space; did you check that.