Quality hard drives
12 TB hard disk intended to replace older Western Digital hard disks of lower capacity. They are placed in RAID 1 in a Synology 423+ NAS for domestic use (multimedia, storage).
There's no problem swapping hard drives and configuring them. They're fast and so is access to data.
The only criticism I would level at them is that they 'scratch' a bit when they're in use, and you can hear it. In short, they are relatively noisy when used intensively.
They're still great products and I don't regret my purchase.