How to remove a domain set up in Plesk (7.5.x)
 

I will remove one of domains set up in Plesk (7.5.x). What's the best way to remove it? Should I remove it completely? Should I disable the domain but leave all files for the time being just in case?

I would remove it completely, why waste hard drive space on the server.

Don't you worry about deleting an important file by accident which you might need in the future ...? Or you simply make a backup somewhere and you go ahead and delete files on the server?

I have a back up of all my websites on the server. I don't know what important file your talking about? But the only thing it should delete is files for the domain name your going to remove. Nothing else should be deleted.

Yes, only what is associated to that domain is what will be deleted. If you think you will use it again, just make a backup and then delete it.