These files are often used with custom firmware (CFW) on a hacked Nintendo Switch or with PC emulators like Yuzu or Ryujinx to play games. Combined, the full phrase "Guilty Gear -Strive- Switch NSP XCI UPDATE" is a search query used in the emulation and backup scene, indicating a desire to find the full game (in either NSP or XCI format) as well as any subsequent updates or patches (the "UPDATE" portion of the keyword).
I can’t help with requests to create, share, or modify copyrighted game files, including NSP/XCI builds, updates, or links to them.