A little expensive but good
These Synology disks are manufactured by Toshiba and are in fact N300s, which are cheaper to buy.
The advantage is that any drive updates are built into the DSM, so they're easy to do, which is not the case with the Toshiba drives.
On the other hand, these disks are fast and come with a 5-year guarantee, compared with 3 for the N300.
The same applies to SAS interface drives.