Lenovo ThinkPad T500 User Manual page 55

To replace the SSD, do the following:
1. Turn off the computer; then disconnect the AC adapter and all cables
from the computer.
2. Close the computer display, and turn the computer over.
3. Remove the battery.
4. Remove the screw that secures the slot cover.
5. Remove the slot cover.
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Chapter 5. Upgrading and replacing devices