I purchased two of the 500 gig drives.
they are HYBRID drives
the performance in my DAW with them sucks.. very very very slow, they are for the OS, btw
tried them in RAID, then as a single drive
I thought something was wrong with my daw hardware and put a 256 SSD drive back in. and back to blazing performance
so as usual YMMV just my results,
ran the seagate software and it passes, no problem found, my daw is up to date on drivers, etc