You are hereToshiba U400 Laptop Harddisk and Memory Replacement Guide / HDD Replacement
HDD Replacement
Lets open up the harddisk plate first and see what is in there.
The harddisk plate is held together by two Philiphs screws. These must first be completely unscrewed, they are not very deep.
The plate is snapped into place, and must be lifted up from the notch in the bottom-left corner. It wont come off and will need pulling with moderate strength. Don't worry it is flexible plastic and wont break. It will pop out with a click.
Once the plate is off, the harddisk will be immediately visible. This is a SATA harddisk and is connected directly to the motherboard. You don't need to open any more screws at this stage. There is place behind it to slide it out and a plastic tag is provided to make it easy to lift it up.
Lift up the disk using the plastic tag and gently pull it out.

