I own a NAS 4-bay from QNAP. I had absolutely no problems with the hard drives. I pushed them into the bays as delivered and the system took care of everything else.

" .........Internal Seagate drives must first be formatted before use. Bootable hard drives are formatted during the installation of the operating system (i.e. Windows or macOS).

However, if you want to use a hard drive that is formatted for another type of computer or is not pre-formatted at all, you must format it first before using it. Hard disks used as storage drives must also be formatted.........."