How to access last modified date/time for file on exFAT with 10 ms resolution?

Question

From my research, exFAT has a 2-second resolution for the last modified date/time of files. Also, there is another field for the file storing the offset to the last modified date/time with a 10-millisecond resolution. Am I correct about this?

When I display file properties in Windows Explorer, or use QFileInfo::lastModified() (from the Qt framework) to analyze the file, both methods only display the last modified date/time down to a 2-second resolution.

If I am correct about the above, how do I access the more precise timestamp using Qt, or the Win32 API, or Windows Explorer?

Answer 1

According to FAT32 and exFAT, which file timestamps are supported? :

Timestamp granularity of 10 ms for Create and Modified times (down from 2 s of FAT, but not as fine as NTFS's 100 ns)

Timestamp granularity for Last Access time to double seconds (FAT had date only).

Do you HAVE to use lastModified ? Does Qt expose two other fields?

Note: that "double seconds" granularity matches your observed "divisible by 2000 msecs"

Answer 2

Here 's the response from a Microsoft rep for what it's worth.