PDF files with highlighted content won't save to vault

You can change the Virtual Volume Provider. Cryptomator supports three types:

  • WebDAV: Integrate the unlocked vault as a network share
  • Dokany: Integrate as a virtual volume, requires thirdparty library Dokany
  • FUSE: Integrate as a virtual volume, see WinFSP: How to use it

They all have pros and cons, you need to see which one works. We suggest WinFSP for Windows.