If multiple files are selected for file transfer, the copy operation will retroactively cancel all progress upon reaching a (duplicate) .DS_Store file, forcing the user to restart the copy operation from the beginning. Some Google Drive users on macOS reported that .DS_Store files were being flagged for copyright violations. Google stated that they had addressed an issue that "impacted a small number of Drive files" to try to prevent this issue from occurring. See also Windows thumbnail cache Desktop.ini AppleSingle and AppleDouble formats References External links Binary format specification from Kaitai A reverse-engineered description of the file format from Mozilla (Mark Mentovai) A more detailed description of the file format (Perl documentation by Mark Mentovai and Wim Lewis) Perl code to decode the .DS_Store format A blog post walking through parsing the .DS_Store file format DS Store MacOS Articles with underscores in the title