Currently Best Buy is selling a 14 TB external disk for $250. Sadly, the days of exponential disk growth of capacity and reduction in price are over. So this is a good sale price. <https://forums.redflagdeals.com/seagate-14tb-external-hd-249-99-save-120-2726376/> I want an internal drive but externals are cheaper, so I bought this. I will have to "shuck" it (remove the case). That will void the warranty, so I wish to test it with Smart Mon Tools. After a certain amount of thrashing about, I discover that - a Seagate USB <-> SATA system has/had bugs switching between "UAS" mode and plain old USB Mass Storage mode - UAS mode is faster for disk operations, so the kernel blocks USB Mass Storage mode on Seagate external drives. - SMARTmon Tools needs USB Mass Storage to deal with this drive To get out of this corner, read: <https://www.smartmontools.org/wiki/SAT-with-UAS-Linux> <https://blog.karssen.org/2022/05/19/getting-smart-information-from-a-seagate-expansion-portable-drive/> The key thing is to: - disconnect the drive - add a "quirk" to suppress UAS for this drive: See "Temporary Settings" in the page linked above - connect the drive again. Check if it is USB Mass Storage - do SMARTmon things - disconnect the drive - unquirk NOTE: The quirk setting didn't work for me. The suggestion was: echo "0x0bc2:0x231a:u" > /sys/module/usb_storage/parameters/quirks The first hex number is the disk manufacturer (Seagate is 0bc2) The second identifies the model. In my case, it should be 2038. I got this from a line in dmesg output about the drive: usb 2-2: New USB device found, idVendor=0bc2, idProduct=2038, bcdDevice=18.01