diff --git a/Manual-Testing---Dev.md b/Manual-Testing---Dev.md
index 8d252e6..d85509e 100644
--- a/Manual-Testing---Dev.md
+++ b/Manual-Testing---Dev.md
@@ -21,6 +21,7 @@ We want to ensure no regressions in compatibility with currently working systems
 * Validate more than one SCSI image on the SD card works.
 * Run [SCSI Director Pro 4](https://macintoshgarden.org/apps/scsi-director-pro-40) to validate no regression in performance.
 * Run at least two "Full Tests" in [Silver Lining 5](https://macintoshgarden.org/apps/lacie-silverlining-531-more) without error.
+* Format a drive with Apple SC HD Setup & Disk Utility.
 
 ### Other Systems