Google Photo/Drive Storage

I've been cleaning out my drive and photos lately because I've been on the edge of having no storage for a year. I removed A LOT of photos yesterday and now I am again out of storage.

Upon investigation, 'Device Backup' is now taking up a third of my storage space. Delving into that further, MMS messages backup is taking up 6 gb total.

I do not have Google One.

I don't see any way to remove the MMS without deleting the entire backup.

Anyone have experience with this?