XPS 8700, BIOS A12, max HDD?

Hi,

Some time ago I have changed the supplied Windows 8.0 Pro to Windows 10 Pro. The PC has been largely running fine, (although small reservations about latest Windows 10 update).

QUESTION
It is now June 2018, and I still boot from the mSata 256GB C drive, but I want to greatly increase the secondary drive size. I am using the latest A12 BIOS., so what is the relevant supported max HDD size for my XPS 8700 (2013) ? And any advice/tips please?

Thank you in advance peoples !  :Smile: