: Identify which files are redundant. There’s no point in "zipping" trash.
: Never keep your only copy in a single _y_pakizip archive. Use the 3-2-1 backup rule (3 copies, 2 different media, 1 offsite). _y_pakizip
The Ultimate Guide to _y_pakizip: Mastering Modern File Management : Identify which files are redundant
: Use ISO dates (YYYY-MM-DD) in your filenames to keep archives chronological. 2 different media