The filename typically represents the first part of a multi-part compressed archive created with 7-Zip .
: Unlike a standard .7z file, the .001 file contains the central directory or "header" information for the entire set. If this specific file is corrupted or missing, the other parts (even if they are perfectly intact) become virtually impossible to extract because the program won't know the file structure or where one file ends and the next begins. SS-Tas-011_v.7z.001
An interesting feature regarding this specific file format and naming convention is its : The filename typically represents the first part of