Update installation.md (#76)

Rat-OS · May 6, 2023 · d5fa7b8 · d5fa7b8
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diff --git a/site/docs/installation.md b/site/docs/installation.md
@@ -30,6 +30,8 @@ Alternatively, if you're using a pi with Ethernet, you can use an ethernet cable
 
 :::info
 It is heavily recommended that you flash your board and make sure it is detected in the configurator **before** you plug in your stepper drivers and start connecting your wiring.
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+It may be required for you to use an SD Card to initially flash your board. If this is required, then be sure to use a good quality SD card that is no more than 32GB in size. Additionally, it should be formatted with either FAT16 (sometimes just called FAT), or FAT32 with a cluster size of 8kb or 4kb
 :::
 
 After completing the wifi setup wizard, wait a couple of minutes, then open [http://RatOS.local/configure?step=1](http://RatOS.local/configure?step=1) in your browser (or whatever hostname you chose during setup). Complete the wizard to flash your control board and optionally a toolboard. When you've done that successfully, the configurator will lead you to Mainsail, which we'll now use to update RatOS and related packages to the latest version.