Are the last-gen textures always in one file?

[FinaleStar]

So yeah are the textures always in one file? Like this : 

 

Is this something that is new for last-gen or have they always been like this?

 

Also another thing I play WWE 2K16 on PC so I usually edit textures a lot.I have to ask is it possible to use this texture in the game or would I have to split them up manually?

[UndertakerWLF]

Pretty much yes, you may have to remap the textures since they were originally mapped for last gen models.