From Windows, how can we open a command line on the Android filesystem?

Wolf K wrote:
[...]
I don't see a "need" to back up the whole phone, since I copy
photos/videos ASAP after taking them, often within an hour or so. The
email merely duplicates what arrives on the PC. If I mail from the
phone, I may send a copy to myself, but very few of emails are that
important.
[...]
Sure, the back-up issue is a plausible scenario, except that I don't use
the phone for anything other than calls and photography, plus news and a
handful of neat apps [1]. No music or movies or games etc. And as I
said, I copy (backup) all new stuff to my PC box at least once a week,
and usually within an hour or so after taking the photos. So I don't see
a need to back up the phone. In fact, now that I've lived with 64GB SD
storage, I feel that's more than I want. But smaller SD cards are
getting almost impossible to find, so...

For your use, backup indeed isn't an issue, provided you don't mind
the 'risk' of 'losing' your "handful of neat apps" (i.e. knowing which
ones you had and where/how you got them) or/and their settings/data.

However many people *do* care about losing their apps, their app
settings, their app data, etc.. "The Real Bev to the Central Desk,
please!" :-)

As for backups of our PCs, that's handled automatically while we sleep.

You *sleep*!? What an utter waste of time *that* is!