Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to change a computer hard drive disk [title] If your hard drive is still working, make sure you make recovery disk or image by using backup or recovery software. [step] If your drive has already failed, hopefully you have your important files saved somewhere as backup. [title] Obtain a new hard drive.

Ending1: [step] Most small-sized hard drives need an old hard drive to go into recovery. However, it may take a long time to get old hard drives to get back to their original capacity. Ending2: [step] Make sure you have the right type of hard drive for your computer. Generally speaking, you want to replace your original drive with a similar drive to make the process easier and simpler. Ending3: [step] An external hard drive, such as a wineing or tonneau 2200. [title] Insert the hard drive into the cd/dvd cd slot. Ending4: [step] Many motherboards use specific chf-128 drives, all designed to be small enough to easily safely use. The amount of space requirements depends on how big a drive you have, but a 6 gb (2.4 l) drive should be enough to safely run computers.

Answer format: ending1/ending2/ending3/ending4