Lenovo IdeaPad U550 User Manual page 72

Chapter 6. Upgrading and replacing devices
To replace the hard disk drive, 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 then turn the computer over.
3
Remove the battery pack.
4
Loosen the screws
memory compartment in place; then remove the cover
58
that hold the cover of the hard disk drive/
a
b
.