Lenovo ThinkStation P410 Hardware Maintenance Manual page 126

2. Pinch the two clips toward each other as shown to open the rear cover of the enclosure.
Figure 47. Opening the enclosure from the rear
3. If you are replacing an old hard disk drive, do the following:
a. Slide the hard disk drive out of the rear of the enclosure.
Figure 48. Removing the hard disk drive from the rear
b. Flex two sides of the bracket to remove the hard disk drive from the bracket.
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ThinkStation P410 Hardware Maintenance Manual