diff --git a/backup.sh b/backup.sh
index 07ea438..020609c 100644
--- a/backup.sh
+++ b/backup.sh
@@ -3,7 +3,7 @@
 echo "enter data directory"
 read data
 echo "enter size of backup media"
-echo "format: 25G"
+echo "format: 24G"
 read disk
 
 mkdir -p out