Draft:Content/Pack
The Pack directory contains SARC archives which contain other files, in order to minimise loading times.
Content/Pack
Draft:TitleBG.pack
TitleBG.pack is a SARC archive which is found in Content/Pack. It contains frequently-used files that the game keeps loaded into memory in order to access them quickly.
Regional TitleBG packs (e.g. TitleBG_USen.pack)
Regional TitleBG packs (named with the format TitleBG_XXxx.pack, where XX is the region code and xx the language code)) are SARC archives which are found in Content/Pack. They are similar to the normal TitleBG.pack, but contain files that are used in specific languages.
Draft:Bootup.pack
Bootup.pack is a SARC archive found in Content/Pack. It contains files that are only used during the initialisation process and unneeded afterwards.
Draft:Bootup_Graphics.pack
Bootup_Graphics.packis a SARC archives which are found in Content/Pack. It is similar to the normal Bootup.pack, but contain contains shaders and other miscellaneous files related to the graphics system.
Regional Bootup packs (e.g. Bootup_USen.pack)
Regional Bootup packs (named with the format Bootup_XXxx.pack) are SARC archives which are found in Content/Pack. They are similar to the normal Bootup.pack, but contain text files that are used in specific languages.