my macbook's hard drive gave up on me recently. I had my sister bring it to an authorised service centre and had the hard drive replaced. I have my macbook back but the hard drive was named after my sister. I'm trying to rename it by selecting the hard drive's name then press enter/return but it's not working. I tried renaming other folders that way and it works. I also tried going to the Get Info, expand the Name section, but the hard drive's name is grey and i cannot rename. Is there other ways i can rename my hard drive? I hope someone here could help me. Thank you in advance!