Knowledge Base

TreeSize, SpaceObServer

Question / Problem

I've noticed that the "Last Access" date is not updated, it is much older than the "Last change" date. What is the reason for this?

Answer / Solution

The last access date of a file is maintained by Windows. Since Windows Vista/Server 2008, Microsoft disabled the automatic update for the "Last access" date by default to improve system performance on NTFS formatteddrives. Because of this, the date won't be updated anymore if a file content is changed for example. That is also the reason why the last access date isn't a good indicator anymore for recent usage of a file.

For more information on these topics, please refer to the following MSDN articles: