The excellent backup program Arq in version 7 is available today and tomorrow with 40% discount. We already presented it to you here. We also used it for our own cloud storage solution together with a small Synology – and still do. No problems at all so far.
$36 for an excellent backup program incl. cloud storage, subscription cancelable
The discount is for the Premium called variant, for that you get the backup program itself, one year of updates and 1 TB of cloud storage. It is a subscription that costs 25 dollars per year in the following period. However, you can also simply cancel and continue to use the backup program if you do not need the cloud storage. If you want to update the software later, for example in two years, it will only cost 25 dollars, which is pretty fair. Unfortunately, there is no lifetime purchase since Arq 6, which is somehow understandable with the constant development.
If you want to have a look at other backup programs before buying, we have put together an overview here. But if yours are very important to you, Arq is still a very good choice.