Olympus died a brutal death

[rotund monolith]

rest in pepperonis (it just crashes when i try to install everest)

[brazen ravine]

As of the Everest Core update, Everest tries to create symlinks in order to share these two folders between the vanilla and modded installs of the game:

• Saves, to sync save data between vanilla and modded
• Content, to avoid making a duplicate of all the game assets and save about 1 GB of storage space
  However, creating a symlink requires admin privileges on Windows. Installing Everest will still work if you choose not to give admin privileges, but you won't get the benefits listed above.

Creating the symlink can also fail on external drives that use non-NTFS filesystems (such as some flash drives). Installing Everest 4482 or later will still work on these filesystems, but data will not be shared between vanilla and modded. If this is an issue, moving your Celeste install to the C drive should fix it.

[cedar wind]

read the bottom paragraph

in your case your celeste is installed on a non-NTFS filesystem, and your version of everest wasn't told how to handle that

tl;dr install beta