Toshiba Qosmio Personal Computer X500 - Manual (Page 182)

Replacement Procedures
5. Remove the following screws securing the HDD holder and remove the HDD holder.
 M3.03.0B FLAT BIND screw x4
Figure 4-7-3 Remove the screws and HDD holder
Qosmio X500 Maintenance Manual (960-Q08) 4-23