Hi Tim,
Good points. I've no idea about international laws. I would guess that it depends where the recording takes place (on my phone).
With the app I use, recording can be automatic, automatic for certain numbers, manual, or deleted at the end of the call.
Yes, the roaming issue had occurred to me. I usually tell new people "this call is being recorded" - if only I could change my ringback tone!
As for jurisdiction of DropBox - I have no idea. That's a fairly significant flaw with cloud storage. Ideally, I'd SFTP them to my own secure server.
Yes, the MP3s are also stored on the phone - just on the SD card so reasonably insecure.
T