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
If you are looking for a on how these themes were created or a white paper on Musical.ly's architecture: You would use a utility like or WinRAR
To access the contents, you must have all subsequent parts (e.g., .002 , .003 ) in the same folder. How to Proceed : This is likely the
(MP3/OGG) if the "Classical" theme included specific sound effects. How to Proceed
: This is likely the signature or initials of the creator who packaged the theme. .7z.001 : This is a split 7-Zip volume .
: Likely refers to a specific UI skin, icon pack, or sound set designed to give the app a "classical" or vintage aesthetic.