diff --git a/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md b/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
index 8b75d09..417197b 100644
--- a/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
+++ b/content/maker-things/installing-bltouch-compatible-firmware-onto-the-twotrees-sapphire-pro.md
@@ -11,13 +11,13 @@ I installed a BLTouch/3D Touch probe onto my TwoTrees Sapphire Pro, and configur
 * Enable Universal Bed Leveling (replace the `AUTO_BED_LEVELING_BILINEAR` define with `AUTO_BED_LEVELING_UBL`), as Bilinear was terrible for me.
 * You can also enable the Repeatability Test command with `Z_MIN_PROBE_REPEATABILITY_TEST`.
 * Build with `pio run -e mks_robin_nano35`.
-* Copy `.pio/build/mks_robin_nano35/Robin_nano35.bin` to the SD card.
+* Copy `.pio/build/mks_robin_nano35/Robin_nano35.bin` to **a FAT32-formatted** (important) SD card.
 * Insert the card into the printer and turn it on.
 * Done!
 
 * * *
 
 <p style="font-size:80%; font-style: italic">
-Last updated on April 24, 2023. For any questions/feedback,
+Last updated on May 29, 2023. For any questions/feedback,
 email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
 </p>