Where Does Gmail Store Mail and Offline Cache?
Gmail keeps mail on Google servers with the phone holding offline cache and settings in a private sandbox.
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Gmail mail lives server-side. The sandbox holds offline copies, attachments in transit, drafts, and account settings. Storage pressure hits the cache first, never the mailbox.
Offline mail settings decide the local footprint. Fewer offline days means a smaller sandbox. Labels and filters apply server-side, so every client agrees after sync.
Where Gmail stores this, by platform
/data/data/com.google.android.gm
Private sandbox for offline mail and settings. Mailbox is account-side. Cache size follows the offline-days setting in the app.
/var/mobile/Containers/Data/Application/<guid>/Documents
Sandboxed container with the same account mirror. Labels sync after login. Reinstalls only reset offline cache.
Frequently asked questions
How do I free Gmail storage on the phone?
Use the in-app storage manager to clear cached mail without touching the account. Offline days setting controls how much it keeps. Server mail never deletes from cache clears.
How do I move Gmail to a new phone?
Log in and mail syncs from the account. Labels, filters, and signatures follow. Offline cache rebuilds to the configured window automatically.
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