On Mon, Feb 26, 2024, at 18:09, Andrew McGlashan via luv-main wrote:

> I wonder if you could do just as well with a USB-C to USB hub device 
> attaching a HDD to a mobile (or directly without a hub).
>
> The mobile will be so much faster.

Good idea.  I've done this.  Doing it on a mobile phone with
dongles and cables hanging off it is a bit more cumbersome than
doing it on a laptop, but it works.  And it sure is less to
carry.

In my case, I took along a such a hub (with SD and μ-SD readers)
on my last big trip, intended just as a backup to my laptop, in
case of failures. (I also took a small chording keyboard —
Decatxt.)  But when my laptop became unusable from a broken
hinge mount (Librem-13v4, long tale of woe omitted), that backup
plan got enacted, with the hub connected to my Pinephone.  As
the laptop runs Debian and the Pinephone Mobian, I could do all
the same stuff (which entails some bulk, scripted, systematic
renaming of image files to a consistent pattern across images
taken on different cameras and mobile phones, in different time
zones).  But if all you're doing is copying files, then plugging
into any phone and copying via the file manager should do the
job — though that might restrict your choice of filesystem on the
external drive.

A few things to be aware of if you take this route:

1. Some phones can't output enough power through their USB-C
   port to power the hub and even just one or two attached
   low-power devices.  So you (or your friend) will probably
   need to supply power to the hub through its USB-C port (for
   which you can probably use your phone's power supply).  If
   you want to store the photos on your phone as well as on the
   external drive, then you can just copy the photos off the SD
   card onto the phone with a suitable reader on one pass, and
   then copy the photos from the phone to the external drive on
   a second pass.  Then you could do without the hub, though you
   might need a USB-C to USB-A adapter and a power supply for
   the external drive.  Another variation, if it works, is to
   put a μ-SD card into your camera (likely with a full-size
   SD-card adapter), and then slip the μ-SD card into your
   mobile phone's μ-SD-card slot to get the photos off the card.
   Then you wouldn't need a separate card reader.  But that
   depends on how much free space you have on your phone, and how
   many photos you take each time.  And on many phones, the card
   slot isn't hot-swappable, so you have to got through
   shutdowns and power-ups.

   Whatever you do, try out the setup before you travel.

2. Some USB-C plugs and sockets aren't snug enough, and can
   wiggle about, causing annoying disconnections.  That's part
   of what can make it a cumbersome setup, in that you may have
   to avoid jiggling connections while using the phone.

3. When travelling, my usual regime is to store the photos on my
   laptop (or on a phone with a big µ-SD card), and on an
   external drive (or big enough USB flash stick).  I make sure,
   as far as possible, they're kept separately.  If the laptop's
   in my carry-on backpack en route, then the external drive is in the
   hold luggage; if I leave the laptop in my hotel room, then I
   take the external drive in my day-pack backpack.

For this sort of thing, one immensely useful gadget is a tiny
USB-C to USB-A adapter.  (I got mine off eBay, but there must be
many sources.)  It's a USB-C plug attached to a small board with
USB-A contacts designed to slip inside the shell of a USB-A
plug.  I think it does only USB2 speeds, though.

Again, I hope this is useful.

And thanks to Russell Coker for his comments.  Implicit in that
is the need to try things out before you travel.  I don't know,
doing a fresh install is not all that much trouble, I think, so
maybe still worth doing even on an old machine.


— Smiles, Les.
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