[[Home Menu]] loads this file / opens this archive during [[Home Menu|startup]]. When accessing this file fails, like when the file/archive is corrupted(or at least on older system-versions), the result is a brick due to Home Menu using [[SVC|svcBreak]]. [[User:Yellows8|Yellows8]] bricked a 3DS this way due to corruption via invalid [[FSFile:Write]] flush flags. When opening this extdata archive(0xf000000b) fails, Home Menu executes svcBreak.
=== Tools ===
* [https://github.com/ps3hen/ctr_toolkit/tree/master/extdata_tool extdata_tool] - Extract/verifies standalone extdata images and title extdata FS.