diff --git a/TestGrid.md b/TestGrid.md
index 37c2b8a..36577f1 100644
--- a/TestGrid.md
+++ b/TestGrid.md
@@ -6,9 +6,10 @@ This page is about the "Test Grid", which is also called the "pubgrid".  The pub
  * to enable small-scale trial use of tahoe
  * to help the tahoe community gain experience with grids of heterogenous servers without a pre-existing social organization
 
-The pubgrid also has a critical non-goal
+The pubgrid also has two critical non-goals
 
   * The pubgrid is not intended to provide large-scale storage, and it is not intended to be reliable.   Don't store any data in the pubgrid if losing it would cause trouble.
+  * Don't view the pubgrid as a free hundreds-of-MB backup service.
 
 ## Cautions