Musical.ly Classical Theme_nk.7z.001 -

You would use a utility like or WinRAR to "Extract" the first file, which automatically joins the others to reveal the full folder or file inside. Probable Contents

If you were to open this archive, it would typically contain: Musical.ly Classical Theme_NK.7z.001

: This is likely the signature or initials of the creator who packaged the theme. .7z.001 : This is a split 7-Zip volume . You would use a utility like or WinRAR