[GraemeJ]

Thanks for the quick response Mike. I certainly wouldn't wish v5 to be delayed for this, or any other new ideas that come along, but it would be good if it was kept in reserve for later.

How best to implement something like this, I leave to you - you have a much better idea of the current file structure than I do .

One thing I should add is that I never do a backup direct on the tablet, it's always done from the PC, using Companion. The eliminates the need for a USB link to the PC (which is where I prefer to keep the backup files).

If working that way, could you not make use of the Archive attribute, which is what PC's use to determine the files that have changed since the last backup? I know very little about the Android platform, so I don't know if a similar attribute is used in that file system but, if it is, then half the work is done for you.

Later:

A bit of research seems to indicate that there is no archive attribute in the Android file system, just a read only one, so that's the end of that idea . I suppose you could still use it when working in Companion, but that might be too limiting for some users (although Companion is so useful, I couldn't imagine why anyone would not want to use it).