The Toshiba x300 is a consumer drive, the drive they are offering is an enterprise grade storage drive. I have only bought enterprise or nas speed drives in the past. Consumer drives may not be built to the same standards.

I’m running Raid z2;and have considered even z3 which should be plenty of redundancy for older drives. Well that and backing up data to a separate location.

That drive could run another 5 years without any problems.