ROM Hack Question Why can I not open DDS Files?

[HydrosPlays]

So I was messing with the assets from Super Dragon Ball Heroes World Mission and I came across the card image files, or so I believe, because its under a data.cpk that I extracted and has a folder called /cards/ and inside are about 1000 DDS Files that Photoshop, GIMP, Paint.Net, etc can not open at all. There are other asset images with dds files that will open and view just fine but with these I can not open and I am not sure why not. I have installed the vast plugins and programs in order to view or open the files but nothing has worked. Was curious if anyone else could get into the data_08_win.cpk of SDBH: World Mission game and go to the cards folder and try to open them? I can provide the DDS as well if needed

Thanks
Hydros

 

[masagrator]

What did you use to unpack .pck file?

Edit: And are you sure about filename? Because i can't find any *.cpk file (this from patched with v65536 update game)

https://raw.githubusercontent.com/masagrator/DB-HWM/master/filelist.txt

 

[HydrosPlays]

What did you use to unpack .pck file?

Edit: And are you sure about filename? Because i can't find any *.cpk file (this from patched with v65536 update game)

https://raw.githubusercontent.com/masagrator/DB-HWM/master/filelist.txt

Is there a dump of the NCA or something you can share possibly? I can not seem to extract my NCA the CPK that I was referring to was from the PC Version apparently not switch even though they labeled it as switch. My mistake. I am trying to extract the NSP/XCI but I get stuck on the NCA and section 1 and 0 are corrupted it tells me

 

[masagrator]

@HydrosPlays probably because you have old keys. For update v65536 you need 07, for base game 06 (you can check it if your file has master_key_07 or/and master_key_06).