Hello:
I have been using Pegasus Mail for the longest while.
To the point that at one time I have had over ten years of emails from three (and for a couple of years, four) different accounts divided like this:
eg:

2000
    inbox - default and accounts 1/2/3  
    outbox - default account
    outbox - account 1
    outbox - account 2
    outbox - account 3
2001
    inbox
    outbox
    outbox - account 1
    outbox - account 2
    outbox - account 3

Then one year I decided to archive most of it.
As the archive grew, I realised that it was taking as much space as it was before being archived.
I just did not see them till I needed to.

Eventually, I made a drastic reduction and ended up losing some data I eventually needed so ...
I am now at ten year point again and need to find a suitable solution.

I recall that the archive process needed R+W media (FDD, USB stick or an external HDD) in order to work properly and was wondering if that had changed.

This because I would like to explore the possibility of dumping the archive to a DVD or CD (yes, I still have a reader/writer) and be able to access/search the emails achived on that media by "mounting" it via a Pegasus Mail installation.
ie: just like if it was archived but residing on RO media instead of inside my box taking up HDD space and subject to HDD misshaps.

Properly written quality media will surely outlive me and having more than one copy is probably insurance enough.
The important thing is that the archive be indexed just like Pegasus Mail folders and searchable.

Any idea as to how to get that done these days?
Thanks in advance.
Best,
S.