As compressed files and folders consume less space on disk, they can be automatically compressed. It may also be the case that the compression on the drive/folder is enabled knowingly or unknowingly.

Learn how Compress Files, Folder, Drive behaves in Windows 11/10. Windows File Compression feature lets you compress files, folders & drives to free up disk space.

Files by Google already offers solid file management features with options to back up files and folders to Google Drive, auto-categorization, and more, and it will soon gain file compressing ...