editing suggestion please

I have created the edit module in which the some 4 categories are hard coded and other categories can be provided by the user in the text field. I mean if he does not choose from the select menu, he can add his/her own category.

But I am dumed there where i store all the images and the attachments to that very folder of the category like category IS : COPLES and the record inserted is 10, so itwill create a folder of COPLES and a folder of 10 inside COPLES to make it different from other records.

NOW I have to edit the record and i display the info as entered by the user when he first added the record,

If that changes the category from COPLES to HOPES, then what should i do?

delete the folder of 10 inside coples and then move the files to the HOPES folder or do something else?

I think the above will carry a lot of load to the server.

Is there some other way you can suggest me, or i should give the access of category at all.

Please provide your suggesstions, needed very much, i want to make a decision based on your calculations and mine too

Cheers/