This is what I had imagined.

Cya

the basic rule, if you choose to apply my solution, is to sync BEFORE running your local/remote client.

In your example :
1 – you download mails this morning with your remote client (usb on another computer)
2 – you’re syncing with Synctoy on your local computer
3 – you can now download new mails on your local client
4 – you’ll have to sync again before using your remote client

I think that it will probably mess things up if you do second point before third one.

Of course, if you don’t use remote client for some days, you don’t need to sync each time you download new mails…

Cheers.

If I download emails at other pc (usb flashdrive) now in morning, afternoon in my regular pc with thunder installed at hard disk, and in night I just run SincToy and done, both emails will be “merged”?

Or I need only download emails at one place before sync again to avoid lost emails?

My explanation was an little confused, but I hope that you understood.

Thank you guys!

allow me to suggest another solution for having Thunderbird (and Firefox also) both on your computer and portable device :

1 – create a directory on your hard drive that will be the mirror of your portable device (e.g. : USB key)

2 – unzip a portable version of Thunderbird in this directory.

3 – if not already installed, make a fresh installation of Thunderbird (”normal” version) on your computer (with default options and paths)

4 – copy your whole profile folder (as described in the article above) in the portable profile folder

5 – now the trick is to tell to your local version of Thunderbird where your profile is: use the profile manager (see : http://www.mozilla.org/support/thunderbird/profile )

To sum it up : you now have a “normal” (local) version of Thunderbird but with your profile stored in the “portable” version folder.

The main advantage is that you can still use your local version as the default mail client (or default brownser for Firefox) on your computer when at home (it is not possible, or at least not very handy to use a portable version as default mail client or brownser).

You then only have to sync (SyncToy is perfect) your mirror folder before (and after) running the portable version elsewhere.

This way you never have to bother about add-ons or config or whatever : you always have the SAME thing both on local and portable versions.

It is VERY usefull when applied to Firefox : for example : if you bookmark a page or add an extension, you’ll find the same thing when running the portable version (assuming you’ve synchronised the mirror folder.

Firefox “local” version is your default brownser, the profile folder is on your hard drive (no slow down due to USB key) and you can still run the portable version anywhere you want with all the exact same options, add-ons, bookmarks, history, etc.

I hope it helps.

I’ve tried many solutions before this one (including the one described in your article) and I think its the most complete (for what I’m doing with at least…)

Cheers ;-)

(sorry for my poor english, mother tongue : french…)

I’ve been struggling and struggling and nearly gave up until your advice sorted it for me.

You’re a star!