Kirri, it seems you are still using a CompactFlash CF card that has pins in the card reader. You really should switch to SD and microTF cards for 3 reasons. 1. Significantly faster 2 Cheap as chips in high capacities 3. Robust readers with no pins, often plug directly into laptops and tablets.
Your 7D mark !! has card slots for both SD and CF, and you can buy cheap adapters for TF to SD if you want. I haven't used CF for years.
Graeme Bullock
