There are large files under the "public" directory of the BRAVIA Signage server.

If you close the browser while uploading contents to the BRAVIA Signage server, unnecessary temporary files, which could include large files, may remain under the public directory.

C:\Program Files (x86)\SONY\BRAVIA Signage\server
└─ public

This is a known issue. This issue will be fixed with BS1 v1.7.10, but if you find large files under the “public” directory, please delete them. (However, please do not delete the “public” directory folder.)