Been there, done that! Especially with storage being so cheap now (1TB drives for $40!) I've found it's not worth my time to delete thing I think I don't need "to save storage space", since sites I think will be around for forever, like Macintosh Garden and the Home of the Underdogs, can disappear in a pinch and because they're so big it's hard to properly mirror them. HoTU was the place to go for DOS abandonware for the longest time but when they first started having issues I did like you and grabbed what I thought I would want/need and burned some CDs since at that point HDs weren't nearly as cheap.