quick heads up, I just finished my first playthrough.. and was trying to figure out how to clean up the save/load screen of all those saves, in prep for my second playthrough

since theres no ingame way I went straight to the files, turns out my save folder was almost 5gb big .. hah :)

best keep an eye on this if you didn't know already! :)

Use this, it's good: http://www.witchernexus.com/downloads/file.php?id=10

With a 1 TB Hdd, I don't think it will be a problem for me. : )

It's not space, so much as clutter.

I don't understand why we couldn't just have an option to overwrite save files.

Because if you overwrite all the time, and you have problems, you can't reload your saved game that is prior to when to the problem started.
MachineGun

Point taken and you're right. : ) That's why I spend time decluttering.