Internal card backup

[Daniel]

If the card is damage none of the backup option will keep your trends. They are lost as you took backup when the card was already broken. The best option is to make a periodical backup. In the forum there are scripts which can send backup to email once a while.
The best solution is to use industrial grade SLC card which should not have any problems for very long time. Al our new devices use pSLC cards which are also very good for long term performance.