TreeSize runs on any Windows operating system currently supported by Microsoft. The latest patches should be installed. There are no additional system requirements. The Personal Edition does not run on Windows server systems!
Yes, all parts of TreeSize support Unicode.
There are no explicit limitations in what TreeSize is able to scan. The more folders the file system tree has that you want to scan, the more free memory will be necessary to store the queried data. You can reduce the memory consumption by turning off the user statistics, the file extensions statistics and/or the file age statistics in the options dialog. For large server our product SpaceObServer may be suitable as well, which stores the collected data in a database on file level.
Under "Tools > Options > Export > Printer" you may choose the columns included in a printed report. They will also be used for scheduled scans as long as they are started under the same user account..
Please open the TreeSize File Search via the Windows "Start" menu or the TreeSize "File Search" menu, check the drives that should be searched, activate only the custom search type and there add "*.XYZ" to the "Filter Patterns" that should be matched, then press the "Start" button. Another possibility: set a filter in the options dialog of the main application. Then TreeSize will only include matching files when calculating the folder sizes. The results will provide a good overview of the distribution of these file type(s) and can be exported to a text file using the context menu. Our product SpaceObServer, which keeps the data of watched file system trees in an SQL database, has faster and more flexible search and report features.