[GNC] How do I transfer all gnucash data files?

[David Gray]

Adrian,
Thank you for your instructive comments on backing up and transferring gc
data files. I'm happy to say that when I ran a test by transferring the
files to my laptop,  I successfully opened my gc book exactly to where I
left of on my desk PC.

Eric,
Thank you for those very insightful comments relating to transition
protocols. I have to admit, you articulated exactly those details that I
probably would have learned the hard way. When I meet with my understudy in
a few days, I will be sure to discuss those ideas until we commit to a
protocol.

On Wed, May 27, 2026, 7:08 PM Eric S <pub08-gnc at davor.org> wrote:

> On Tue, May 26, 2026 at 10:19:34AM -0500, David Gray wrote:
> > Now I am in the process of training an under-study [...]
> > so I want to share my GnuCash Data files with him.
> >
> > I want to copy my GnuCash data files to a thumb drive
> >
> > [...]
> >
> > 3. Do you have any other insights on this process that I might have
> > overlooked?
>
> Two things.  First:  Be aware that your data file,
> WHATEVER.gnucash, has backups in the same directory called
> WHATEVER.gnucash.YYYYMMDDHHMMSS.gnucash .  The backups are great
> in case the main file gets trashed (due to either computer issues
> or the user's mistakes), but at almost any given moment, the
> backups will be out of date.  A question that shows up here
> sometimes is, "Why are my latest transactions missing?" and the
> answer is sometimes, "you were editing a backup, not the main
> file."
>
> Second thing: During the training/handover period, I presume
> you'll both be working on the organization's books.  If so,
> you'll need to be super careful to avoid both working on them *at
> the same time*; you need to take turns.
>
> Otherwise you could easily find yourself in a situation where
> you've each made changes (entered transactions, say) to your own
> copy, and now your and your understudy's versions of the books
> have diverged, with each containing work that's missing from the
> other.
>
> Recovering from that is doable, but it's Not Fun!
>
> I haven't had that arise with GnuCash specifically, but only
> because I've only ever used it on my own.  The situation happens
> often enough in general -- with word-processor documents,
> spreadsheets, or whatever -- that I can pretty confidently say
> it's a risk that needs guarding against whenever two or more
> people are working on their own copies of the same files.
>
> If you're willing to put the organization's books on DropBox or
> wherever, that might suffice.  (I'm not sure I would; I have a
> deep suspicion of the cloud when it comes to anything
> confidential.  But that's just one man's opinion.  In any case,
> it's a policy decision, not a technical one; others here will
> have a far better idea of whether there are technical issues with
> (GnuCash + cloud).)
>
> Failing that, I'd suggest coming up with a protocol between you,
> for who gets to work on the books at any given point in time.
>
> If you choose not to use the cloud, well, you mentioned a thumb
> drive, so that's an an obvious candidate for the protocol:
>
> (1) Don't just grab any old thumb drive that's handy, but
> dedicate one specifically to this purpose, clearly label it as
> such, and don't use it for anything else.  (If it's low-capacity
> and reasonably inexpensive, there'll be less temptation to use it
> for other things as well.)
>
> (2) The rule is: whoever has possession of that thumb drive is
> the *ONLY* one allowed to do GnuCash work on the books in
> question.  You wanna do some stuff?  You gotta get the thumb
> drive back from your buddy first!  And vice versa.
>
> Either (3A): Both of you be scrupulous about copying the GnuCash
> files off of the thumb drive when you first get possession of it,
> and copying them back to the thumb drive before handing it off
> again,
>
> Or (3B): Edit directly on the thumb drive -- "File>Open" *that*
> copy of the books, *not* one on your hard drive.  Make backups to
> your respective hard drives, of course -- thumb drives can fail
> or get lost.  But consider the thumb drive to be your ultimate
> "single source of truth".
>
> (3B) is a lot less error-prone, but there might be issues.
> There's other stuff that's associated with a GnuCash file but not
> stored within it (I can't recall what, offhand), and that
> association might be lost if the thumb drive doesn't always show
> up in the same place every time you insert it; e.g. if it gets a
> different Windows drive letter.  Advice from people with
> experience of this would be welcome here!
>
>   - Eric
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