I'm now using the 256GB drive (a 850 EVO Pro) as primary with the old 128GB holding my music collection and it's a pain to manage. Ubuntu FDE with multiple drives under /home isn't as simple or reliable as I would like, and I want to move everything back to one single fast drive.

I should probably take the time to reformat & reinstall across both as a ZFS partition, then wait another year for 1TB prices to come down. 1TB SSDs just aren't cheap enough yet for me to justify buying one. 500GB will fill up again very quickly once everything is on one drive.

I'll frequently shoot a few hundred camera raw photos, then export many as 16-bit TIFF to be stitched into large panoramas or fused together (using exposure bracketed photos). This uses huge amounts of disk space and I want a minimum of 100GB free space as a buffer.