Thanks, will any 3.5" SATA drive work on this Optiplex or should I be looking for a definite type of TB Sata drive please?

Thanks

There are only 3 makers of SATA Drive left.  Seagate, Toshiba, Western Digital.  All the other brands were absorbed mostly by seagate.

http://www.microcenter.com/product/400847/1TB_7,200_RPM_SATA_60Gb-s_35_Internal_Hard_Drive_DT01ACA100_-_Bare_Drive

Thanks, at the moment there appear to be at least 3 sata drive models I, II & III and I was just wondering if any or all types of drive were ok for the 760?

SATA 1     SPEED 150 Meg

SATA 2    SPEED 300 Meg

SATA 3    SPEED 600 Meg

Only SSD's get close to 600 Meg in reality.  Most hard drives are in the SATA 2 range.

Thanks to all - great news!