In README.md, there is a line of text with a link that reads:
Use LITTLEFS with identical methods as SPIFFS plus mkdir() and rmdir()
The page at: https://diyprojects.io/esp32-get-started-spiff-library-read-write-modify-files/ appears to have been hacked. It redirects to various other sites including Amazon.com and a fake Microsoft page that says your computer has a virus.