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*There is a [https://github.com/Ryujinx/Ryujinx/pull/6045 pull request] for adding trimming XCI files feature to Ryujinx.
*Ryujinx allows loading .NSP files for updates and DLCs directly, without installing them to the NAND. In contrast, [https://github.com/yuzu-emu/yuzu/issues/9963 yuzu requires installation of these files to the NAND].
::See overview of formats [https://yuzu-emu.org/wiki/overview-of-switch-game-formats/ here].
→WUA (Wii U Archive)
* '''Can be reverted?''' Yes, using extractcd (included with MAME)
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' MAME, DuckStation, PCSX2 (since March of 2021), PPSSPP, DEmul and NO$PSX. Some libretro cores for other emulators are starting to add support.
* '''Can process multi track bin files?''' Yes.
* '''Can be reverted?''' Yes, using the same tool (chdman).
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' libretro Beetle PSX, Avocado, DuckStation, PCSX2 (since March of 2021 and also because PCSX2 now has PSOne emulation functionality as well, so two-in-one), ares, PCSX ReARMed and NO$PSX.
==PlayStation 2==
* '''Tools Used:''' [https://github.com/unknownbrackets/maxcso#features maxcso], [https://github.com/ps2homebrew/Open-PS2-Loader/blob/master/pc/ziso.py ziso.py (requires python3 and pip install lz4)], [https://www.psx-place.com/resources/psxiso-compression-tool.1258/ PSXiSO (contains ziso CLI tool)]
* '''Can be reverted?''' Yes, using the same tool. No data loss.
* '''Playable on Hardware?''' YES Yes - Open PS2 Loader.* '''Playable on Emulators?''' NOYes - PCSX2 (since v1.7.5293)<ref>[https://github.com/PCSX2/pcsx2/pullreleases/tag/6594v1.7.5293 v1.7.5293]</ref>
===CHD===
* '''Can be reverted?''' Yes, using the same tool (chdman).
* '''Playable on Hardware?''' No.
* '''Playable on Emulators?''' Yes - PCSX2 (since v1.7.0-dev-1156)<ref>Added in 1150 but wasn't built. 1156 is the first release with CHD support. [https://web.archive.org/web/20210416020418/https://buildbot.orphis.net/pcsx2/index.php?m=fulllistAutomated Pcsx2 builds]</ref>).
==PlayStation 3==
Cemu (since 1.27) can convert installed titles to WUA, combining the title itself, update (if available) and DLC (if available) into one file. The conversion tool is available via the Cemu title manager.
Based on a small testset of 44 titles with updates and dlc, WUA reduced the overall file size by roughly 16%. It also reduced the number of files per title from 3,500 on average to 1.
(archives compressed in the ZSTD format)
==Switch==
===NSZ===
* '''Archive-quality dump?''' Yes
* '''Playable on Hardware?''' No
* '''Playable on Emulators?''' No
It is possible to merge the game base, update and DLCs on a single NSP with the tool [https://github.com/julesontheroad/NSC_BUILDER NSC_Builder] and compress it to NSZ
==Game Boy Advance / Nintendo DS / Nintendo 3DS==
===ZAR===
[https://github.com/xenia-canary/xenia-canary/pull/165 This Pull Request] adds support to [[xenia]] emulator for loading ZAR (ZArchive files) (archives compressed in the ZSTD format) of a decrypted and extracted dump of XBOX 360 game. *The process is basically to dump your disc, extract files using your favorite tool, and create a ZAR file from it using ZArchive toolor [https://github.com/xenia-canary/xenia-canary/pull/299 xenia-canary->create Zar package option]. But for "*For digital titles (Xbox 360 Demos, Video DLC and XBLA games" etc) you need to extract the contents from its containers using "[https://digiex.net/threads/wxpirs-extract-content-from-xbox-360-demos-video-dlc-and-arcade-game-containers.9464/ wxPirs]" and then use create a ZAR file from it using the "[https://github.com/Exzap/ZArchive/releases ZArchive]" tool<refor xenia-canary->create Zar package option[https://github.com/xenia-canary/xenia-canary/pull/165#issuecomment-1641099753 Xbox 360 Demos, Video DLC and XBLA games needs extraction before using ZArchive]</ref>.
=Other Tricks=
===NTFS Compression===
You can enable filesystem-level compression (like "NTFS Compression" in Windows) for the directory containing your ISOs/ROMs. This has a very noticeable space gain and doesn't affect the emulator's functionality. It's surprisingly more effective than many people would like to give this credit.
* '''Archive-quality dump?''' Yes
* '''Archive-quality dump?''' No (Removes data)
=See also=
*[[List of filetypes]]
=External links=
*[https://github.com/citra-emu/citra/issues/6013 CHD or ZArchive feature requests for citra]
*[https://github.com/RPCS3/rpcs3/issues/4021 CHD or ZArchive feature requests for RPCS3]
*[http://web.archive.org/web/20231127115239/https://github.com/yuzu-emu/yuzu/issues/10025#issuecomment-1493873239 CHD or ZArchive feature requests for yuzu and Ryujinx]
*[https://github.com/xemu-project/xemu/issues/129 CHD or ZArchive feature requests for xemu]
*[https://github.com/86Box/86Box/issues?q=is%3Aissue+is%3Aopen+format+label%3Afeature+ Various image format feature requests for 86Box]
