Yes, you can sort TreeSize lists by any shown column by clicking on the header of the column. In case of the "Last Access " column, the list is sorted from the oldest to the newest date value. Click the header again to sort the list from the newest to the oldest.
The XML files were meant to store the complete results of a scan for recalling them later and to compare them with the latest scan results. So there was (and is) no need for limiting the result display to a certain scan level.
If you are interested only in the uppermost level of the file system, HTML, PDF or Excel exports are quite comfortable, too.
If you simply want to reduce the total size of the XML file, you could deactivate the statistics on users and file types.
You can use command line paramaters to start a scan and automatically generate an Excel report.
You want to scan the drive C:\ and your installation directory of TreeSize is
Your directory for your reports is
"sheet1.xlsx" as your sheet for reports.
In this case, the full command line would look like this:
"C:\Programs\JAMSoftware\TreeSize Professional\TreeSize.exe" /EXCEL "D:\MyCompany\Reports\TREESIZE\sheet1.xlsx" "C:\"
Paths containing directory names with spaces must be embraced by double quotes, so it is a consistent and careful habit, to double-quote all paths, to avoid problems. Instead of retyping the command line every time you want to scan, you can save it into a .bat-file and start it by double-clicking.