I use WD books for my photography, similar to these below.
I have mine for photographs and have it set to raid, so a 12 TB system has 2 6TB drives and it backs up individually to both of them , so if you ever have a drive failure in it, the other one is still ok. I have them set for my photo storage so they go to them when downloaded off my camera. Or you can set them as a single drive, ie the full 12TB
There are plenty of makes, but I have always found Western Digital to be very good drives, so maybe I am a bit biased..
https://www.westerndigital.com/en-gb...BZ0000NCH-EESN
You will find they also do cheaper recertified ones that have been returned and they cannot sell as new, but that depends on availability
https://www.westerndigital.com/en-gb/c/recertified
They also do clearance which are older end of line models, such as
https://www.westerndigital.com/en-gb...BE0120JBK-EESN
You will also find them on Ebay that people have probably bought as the stock clearances etc and sell on at good prices.
Though I do not need the facility to connect the drive to the web, so I use the simple storage version, such as
https://www.westerndigital.com/en-gb...BE0160JBK-EESN
https://www.westerndigital.com/en-gb...BE0120JBK-EESN