soundhax, key-info: info changes

soundhax: specify how many times "may" is
soundhax: clarify that could not play means it will not work
key-info: state that 128GB+ is not recommended

_pages/en_US/installing-boot9strap-(soundhax).txt

@@ -63,7 +63,8 @@ In this section, you will launch Soundhax through the Nintendo 3DS Sound app, wh
 1. If you've never opened Nintendo 3DS Sound before and get tips on how to use it from a bird icon, go through all of the bird tips, then close the app normally and relaunch it
   + In this situation, launching Soundhax immediately would cause these tips to appear on every launch of the Nintendo 3DS Sound until this is done
 1. Go to `/SDCARD`, then play "<3 nedwill 2016"
-  + This may take many tries
+  + This may take many (up to 10) tries
+  + If you see the message "Could not play", you are either on a system version incompatible with Soundhax or downloaded the wrong Soundhax release
   + If it freezes, force the console to power off by holding the power button, then try again
 
     ![]({{ "/images/screenshots/soundhax-launch.png" | absolute_url }})

_pages/en_US/key-information.txt

@@ -40,7 +40,7 @@ You can follow this guide as long as you are able to download files from the Int
 The location of the SD card slot and the type of SD card that is accepted depends on the model of your 3DS. More information can be found on [Nintendo's official support page](https://en-americas-support.nintendo.com/app/answers/detail/a_id/271/~/how-to-insert-an-sd-card-or-microsd-card).
 
 
-The 3DS can read SD cards of any capacity (even those larger than 32GB), but the card must be formatted as FAT32 (**not** exFAT or NTFS). You can use one of the following tools to format your SD card, depending on your operating system: [Windows](formatting-sd-(windows)), [macOS](formatting-sd-(mac)), [Linux](formatting-sd-(linux)).
+The 3DS can read SD cards of any capacity (even those larger than 32GB), but the card must be formatted as FAT32 (**not** exFAT or NTFS). You can use one of the following tools to format your SD card, depending on your operating system: [Windows](formatting-sd-(windows)), [macOS](formatting-sd-(mac)), [Linux](formatting-sd-(linux)). SD cards larger than **128GB** are not recommended due to known issues with custom themes and GBA/DS graphics.
 
 To follow this guide, you'll need an SD card with a capacity of at least **2GB**.
 {: .notice--warning}