Numbers in the filelist.ub

Hi, I can’t find an explanation of the filelist.ub file structure.
Most of the elements are self-explanatory, like leading f, d, u; file and directory names, size in bytes.
But what the second number (e. g. 2277281443939518312) means? This clearly isn’t a timestamp.

It is the “change indicator”. On Linux it is a combination of ctime+mtime. On Windows it is the USN (or last modified time if that isn’t available). If it changes it needs to load the file.

Great! Thank you, Martin, for explanation.