Features 1Tree (Freeware) 1Tree Pro (Licensed Version) 1Tree Pro (Trial Version)
Operate Resources in Batch Mode No Yes Yes
Show the Size for All Resources Yes Yes Only Top 3 Levels
Sort Resources by Size in Descending Order Yes Yes Yes
Intelligent Unit and Decimal for Resources Size Yes Yes Yes
Common Commands Yes Yes Yes
Copy Full Path Yes Yes Yes
Customizable Interface Yes Yes Yes
QuoteIt does exactly what it says: It lists your drives, folders and files by size; D/L was quick, installed easily, and registered without missing a beat. Very simple to see and use and if that is what you are looking for, this program is right. - By Axiomia for 1Tree

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# May 26, 2020, 1Tree Pro v5.0 released.
# Oct 28, 2019, the Traditional Chinese website is online.
# Oct 24, 2019, the Simplified Chinese website is online.
# Apr 10, 2020, 1Tree (100% FREE) v6.0 updated.