I often have to transfer big video files in a hurry from a Solid State Media card such as CF, SXS or SD card to my clients hard drive. This is usually done in a cafe on the way to the airport before they catch their flight back to Auckland.

The quickest (and until recently the best) way to do this was to navigate to the card folder, copy it to the clipboard and then paste the entire Contents folder to the clients hard drive. Then I do a quick check using "File Properties" to check that the camera card being say 27.3 GB matches the destination folder with exactly the same amount of GBs transferred.

I have used this technique without any faults since 2010, until I started using my Asus Zenbook i7 8GB RAM 256 SSD running Windows 10 last year. Since then I have experienced a problem several times where the copy function will only copy a percentage of the whole "Contents" folder, (say only 20.2 GB of the 27.3). I don't always have the time to recopy, so will send off the original camera cards with the client (something I am not that happy about).

There were never any such issues with my previous Sony Vaio laptop, can anyone shed an opinion on why this may be happening?