On Friday, 16 April 2021 at 13:12:40 UTC+1, Andy Burns wrote:
SH wrote:
Tim Streater wrote:

What is a .pst file?

whenever you create/send or recieve an email and all your email folders
all get backed up to a *.pst file.
Only by Microsoft Outlook (the full-fat Office version, not the Express
version)

And nowadays more people probably use a .ost file instead

for Thunderbird the equivalent is a .msf file

The change to .ost was, really, my point. There might well be functional equivalents - or similar - but .pst is somewhat out of date.

I also agree with those who suggest full disk encryption - such as BitLocker (in Windows).