when the file size is greater than 50MB, git prompt an error while pushing to github:

remote: warning: File <filename> is xx MB; this is larger than GitHub's recommended maximum file size of 50.00 MB
remote: error: GH001: Large files detected. You may want to try Git Large File Storage - https://git-lfs.github.com.

there are two ways to solve

1. Upload large files to github (paid)

https://git-lfs.github.com/

download for windows

git lfs track "*.psd"
git add .gitattributes

then commit and push to github but it requires charge for large file upload

2. Ignore large files (free)

git filter-branch --index-filter "git rm --cached --ignore-unmatch filename"

it will remove the file on commit one by one. then you can commit and push to github without error