The file is named DRAKS0005.sl2 . Copy that file anywhere else (Desktop, a folder called "DS_Saves," Google Drive) to back it up.
Where to Find Your Save File (PC) For Dark Souls: Remastered on Steam, the save location is different from the original Prepare to Die Edition. Do not go looking for draks0005.sl2 in the old spots. save file dark souls remastered
Have a horror story about losing a 100-hour save? Or a pro-tip for backing up on PS5? Drop it in the comments below. The file is named DRAKS0005