Is it possible to install a new windows without downloading GTA 5 again?

Solution 1:

1. You should be able to start the game without Epic Launcher detecting it. I haven't tried it with GTA but other games from Epic can be started from .exe files directly from the install folder. I have Metro and Witcher 3 games installed a long time ago and they do not appear in EGL because I moved game files to another drive, but I can play those games.

2. If #1 does not work for you and you need Epic to detect the game try this:

• Move GTA V files to a backup folder (c:/Bak)
• Open Epic launcher and start downloading GTA to a new empty folder;
• Let it create folders and some files, pause the download, and close the launcher;
• Copy GTA files to the folder where EGL is supposed to download the game. C:\games\GameName\\.egstore\bps\Install . Do not copy the old ".egstore" folder from your backup of GTA files! Overwrite the files in the "install" folder with the files you backed up.
  It is best to copy and retain the original backup of the game files in case the next step does not succeed, considering you have enough disk space.
• Start EGL and resume the download. It will detect existing files, verify it and the game will appear in EGL without a need to download.