Switch Manga on, give it a folder, and choose where it may come from: official English editions by default, fan scans and Nyaa only if you pick them.
In Broadcast: Server, Libraries, Media types; then Server, Kinds of media, Manga.
In Classic or Neu: Settings, Media types; then Settings, Library, Manga.
Under Server, Libraries (in Classic or Neu: Settings). Switch on Manga. It’s kept apart from Comics.
Under Server, Libraries, Folders (in Classic or Neu: Settings, Library, Folders): the Manga folder. Volumes go there as Series/Series v01.cbz, and Komga and Kavita can read it too. In Docker, the folder has to be connected to the container (MANGA_DIR, or a folder at /manga or /data/manga). If Usherr can’t save there, Settings, Manga says so, and nothing is searched until it can.
Server, Kinds of media, Manga (in Classic or Neu: Settings, Library, Manga). Your own files always count. Official English editions are the default; Usherr tells them from fan scans by the release’s name. Every series with a known publisher has a link to buy it, since a copy on an indexer still isn’t a purchase.
Off until you pick them. Fan scans from your indexers are only used when no official edition turns up, or for series with none. Fan scans from MangaDex brings chapters, with no account needed: a series then gets a Chapters tab, and big catch-ups run between 2 and 9 in the morning.
One switch adds Nyaa to your indexers for Manga only, after a plain warning: it’s torrents, and while a torrent seeds your connection uploads it to others. It follows your VPN and your seeding limits (Settings, Downloading, Torrents).
On a series, Sources for this series: My settings, Official only or Also fan scans.
Look first shows every new file name. Files are moved, never deleted or overwritten, your place and bookmarks come too, and Undo puts it all back.
Get manga, in Show me how, adds your first series.