Steve on 08 Apr, 2019 05:24 PM
GPG Services is not really the right fit for files of this size. We do show a warning when users try to encrypt files larger than a certain limit, 150MB if I recall correctly.
Are you certain the encrypted file is intact? Have you managed to decrypt it before?
I would suggest to try decrypting the file using the command line
gpg -d mydata.tar.gpg
And make sure to allow a long time for this to finish. Although it's really hard to say if it will be successful. That file size is huge. A tool like VeraCrypt is probably more suitable for that use-case.