Manual method
- Open Google Takeout, deselect other products and select Mail.
- Review which labels are included; choose all mail if that is your intended scope.
- Choose a one-time ZIP export, a practical archive-part size and delivery by download link.
- Save every part when notified. Extract a working copy and retain the MBOX mailbox files and archive metadata.
What you get: Gmail exports messages and attachments in MBOX format. Labels are retained in an X-Gmail-Labels header, which other clients may display differently. Takeout does not provide a Gmail date-range filter. Exporting leaves the mailbox in place. Provider instructions. Supporting reference 1.
Size and waiting time
Planning example: 5 GB; light/heavy scenarios: 0.1–50 GB. These are estimates, not a measured population average or fixed limits. Roughly 25,000 messages averaging 200 KB including MIME attachments. This is an illustrative mailbox, not Google’s storage allowance or a measured average.
Preparation: Google says archive creation may take minutes to days. Large mailboxes also need extraction time and enough local space.
Network transfer of 5 GB: about 1.6 hours at 10 Mbps, 19 min at 50 Mbps, or 10 min at 100 Mbps. This assumes 70% sustained throughput and excludes preparation, manual work and extraction. These are download estimates; online backup takes additional time at your upload speed. Transfer calculations and large-file examples.
Store and check your archive
An encrypted external SSD or hard drive is a good main archive for this collection. Allow roughly 15 GB of working space for the example, including an original, an extracted working copy and room to check it. Very compressed packages can need more. A USB key is useful for a spare copy, but should not be the only one. An encrypted online copy protects against losing the local devices.
Keep the original in gmail/YYYY-MM-DD/original/. Record the account alias, selected scope, date range and missing items. Open old and recent records and sample attachments offline, then compare file sizes or checksums after copying. Keep the source account until you have checked the result. Storage and recovery instructions.
Sources and review
Public documentation was reviewed on 27 October 2026. No signed-in export or restoration was performed. Account options and availability can change; follow the current provider instructions.