Solution to the problem that a Steam folder already exists on the selected hard drive
Original directory Unable to add another library folder in the same directory Find this file in the root directory of the Steam program D:\Steam\steamapps\libraryfolders.vdfAdd a new directory you need to add later as follows: "LibraryFolders" { "TimeNextStatsReport" "1622886485" "ContentStatsID" "1329782524506893618" "1" "F:\\SteamLibrary" "2" "D:\\SteamLibrary" #新增的目录 }Complete Further reading https://keylol.com/t525765-1-1