You could trade in the wife for a newer model :-) Yes, what you’re saying is not hard to do, at all. The key is to make sure that you have very good backups of C and of the <original> D. Install the new D and set up folders as you need to, and then copy from original D to new D. It may be easier to buy a hard disk enclosure (USB-based) and put <old> D into it, and do your copying from there. When you get ready to move your wife’s stuff from her C desktop, make a new d:\wife\desktop directory and just copy everything. Some of it will be extraneous, but at least you will have an exact 1:1 copy of what she had. Then clean out C:\ and especially make a subdirectory for her, and copy the relevant files (i.e. NOT ALL) from the d:\wife\desktop directory back to C: where you have set her up. An enclosure is $25 and a new 8 TB disk is $150. It’ll take you some time to do the copying (correctly) but there’s no reason to replace the PC when you can upgrade for about ⅓ the cost.