Acer AT110 Series User Manual page 43

By default, the system ships with a DVD-ROM drive installed on the
topmost device bay. You can choose to replace these default drives, or
you can install a new storage device on the second device bay.
Please ensure all installed devices support the SATA interface.
To install a 5.25" storage device:
1 Perform the pre-installation instructions described on page 22.
2 Remove the side panel described on page 24.
3 Remove the 5.25" bay cover (1) and EMI protector (2).
4 Slide the tool-less bracket to the left to unlock the bay (3).
5 Insert the new 5.25" storage device (1) and slide the tool-less
bracket to the right in the locked position (2).
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