TL;DR: NMM backup & restore isn't working. I clicked purge & restore - it purged, but hasn't restored. I've got nothing left.
For the past few days I've been trying to install mods for Skyrim Special Edition, but I've failed and have had to restart from scratch numerous times now.
This recent failure, I had been creating a backup after every 'stage' of modding. I had just completely finished the gameplay overhauls that had taken me a couple days alone (possibly overdoing it but the game was stable) and began work on character overhauls.
I took a risk with batch building bodyslide presets for Immersive Armors and my favoured CBBE preset but there was clipping, missing textures and seams so I decided I'd restore the backup I made literally an hour ago. But, as the TL;DR says, it's not working. He purge, he no restore.
It gets to 'copying the data files' and copies Textures8.bsa, then Voices_en.bsa, then Skyrim.esm, then TKDodge.esp, then Update.esm and... stops. The NMM window then delightfully says there was an error during the restore.
Where did I go wrong? Was I not supposed to purge and only restore? Was I a fool to trust in NMM's backup feature? Should I have just copied and pasted my whole Skyrim Special Edition folder every time instead (which I could do since I have it in C:/Games and not Program Files).
So... if anyone has any ideas on how to get the backup to work, lemme hear 'em. I HAVE the backup, it's just sitting there, teasing me. All 26.4GB of it, the amalgamation of my last week of free time, inaccessible. If I wasn't a grown man I'd be crying, but I'm damn close.