Where Does MTG Arena Store Settings and Data?
MTG Arena stores settings in the Windows registry, with cards and progress on the Wizards account and Proton plus clouds around it.
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MTG Arena keeps configuration in the Windows registry rather than a file. A Wizards Of The Coast key under HKCU holds client settings. Cards, decks, and progress live on the Wizards account, always online.
Registry storage surprises file oriented backup habits. Export the key for a complete settings move, or just reconfigure in game and skip it. Nothing restorable matters locally: a fresh install plus a sign in returns the entire collection on any platform.
Where Magic: The Gathering Arena stores this, by platform
HKEY_CURRENT_USER\Software\Wizards Of The Coast\MTGA
Client settings under the Wizards key. Export it before reinstalls or leave it; the game rebuilds defaults. Cards never live here.
<SteamLibrary>/steamapps/compatdata/2141910/pfx/
Steam Play prefix, app ID 2141910. The registry tree rides inside it. Steam and Epic clouds cover the install while the account covers the cards.
Frequently asked questions
How do I move MTG Arena to a new PC?
Sign in with the same Wizards account. Cards, decks, and progress follow the login everywhere. Export decklists separately if you want text backups, since the registry holds no cards.
Where are MTG Arena settings in the registry?
Open regedit and browse to the MTGA key, or change settings in game and let it write them. Back up the key before hand editing. Most options also live in the in game menu.
Does MTG Arena run on Steam Deck or Linux?
Use the Proton prefix with app ID 2141910. Registry based settings ride along inside it. Account content syncs regardless of platform.
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