updated readme with info about new script

README.md

@@ -4,6 +4,19 @@
 
 `PowerShell` script to convert any CSVs found in directory that were created today -
 
-1. saves them as an XLSX,
-1. renames the first tab,
+1. saves them as an XLSX
+1. renames the first tab
 1. moves the XLSX to the parent directory
+
+## Keep Only X Days
+
+Accepts 2 arguments
+- `NumDays`
+  - integer
+  - default is `90`
+- `DebugCommand`
+  - boolean
+  - default is `false`
+  
+  `PowerShell` script to delete objects in the directory/subdirectory specified that are older than `NumDays`. 
+