iTunes won't let me edit any artist info

[zero2krazy]

(First ever Mac desktop) I have all my files from my old PC on an external hard drive but some of the information (artist name, album) are wrong but changes I need to make in iTunes (Get Info) are grayed out.

Thanks for any help

 

[Mike MA]

Did you make sure that the files are not locked (CMD + I)?

 

[zero2krazy]

Under permission it says I can read only and I can't find a way to change that.