[anotheracc88]

Google takeout. Do it every 3 months. Easy peasy..

Good for privacy too. It jas everything! Look through it an permanently delete what you don't want them to keeo.

Note that it is slightly lossy with respect to headers, times etc. Not ideal for anything legal related. For those print them off.

[leros]

Can you easily consume the takeout data?

[anotheracc88]

Yes. For example emails are an mbox file amd there are free mbox viewers. You then have something like an old school mail client to view emails.