[Feature request] Max count of export-files

[Micha-he]

Please add a cleanup-task, so we can get a configurable max count of export-files.

[vmx]

Generally spoken, I'd like to make SD Contacts as simple and reliable as possible.

Here are the problems I see with deleting old files automatically:

• Currently files are only created, never deleted. This is easy to reason about and you can be sure the app didn't eat any of your files.
• Exports can go wrong, but it may time some time for you to notice. If you delete files manually you might see a sudden difference in the file size or so. If it's automatic, you don't and you might loose some data. Though the idea of SD Contacts is that it's simple and reliable as possible
• Determine which files to delete is not trivial. You could iterate through all files in the directory and sort them by file name and only keep the most n recent ones. But what if you've other files in that directory? You could limit it to the known prefix, but even then errors can happen.

[Micha-he]

Maybe you can add an option, that a new export is only performed, if the last backup was x days or hours ago.

[vmx]

That could work. Something like "export at most every n days".

If anyone has any screenshots of apps having a similar option, that would be great. I'm not sure how to word this in a sensible way.

[PhoenixIV]

I am also interested in an auto-clean up and was considering if I need to program something or if I just want to manually clean up every three years. If the required space does not get out of hand including contact pictures.

I see the argument of not wanting to accidentally delete the only working version of a backup.

What I would maybe do for myself would be to auto-delete all but one backup per month.