That doesn't sound right @Orla, how often have you been formatting the SD card?
Are you on the latest firmware version?
It might be worth calling in to our technical support centre on 02920 866 429 or email support@nextbase.co.uk .
@NextBase Tiffany I format it quite regularly as I am constantly checking its progress. I have called the technical support and they advised me to update the firmware which I done quite a while ago but it made little, to no difference to the situation. As I said above, I have ordered the new SD card and it is due to arrive Wednesday, which I will then try out and see how it works.