HP t620 PLUS Hardware Reference Manual page 21

(1) USB-1 port
USB 2.0 flash drive: maximum dimensions 55
mm (L) x 16 mm (W) x 8 mm (H)
NOTE: Be sure that the USB flash drive to be installed does not exceed the maximum size for
that USB port.
9. Align the USB flash drive with the USB port and press the drive firmly into the port until it is
securely seated.
10. If the computer is an HP t620 PLUS Thin Client, rotate the fan assembly down, push the fan
assembly latch (1) toward the front of the computer, lower the assembly (2) until it stops, and
then release the latch.
11. Replace and latch the access panel, and then reinstall the I/O panel.
(2) USB-2 port
USB 2.0 flash drive: maximum dimensions 65
mm (L) x 25 mm (W) x 10 mm (H)
Installing internal USB flash drives 15