I thought my sandisk 8GB class 10 went south when it started performing slowly, was doing the same thing during high ISO video mostly. I did a full format (not quick) on my pc and it was fast again. The file system used in SD cards is odd and takes more time to overwrite old data, than to write to a fully cleared card, or something of that sort.
August 20, 2014, 12:41:30 PM
Topic: Canon 60D Video Stops after a couple mins. (Read 949 times)
60D, Sigma 17-70 2.8-4, Tamron 70-300 4-5.6 VC, EF 50mm 1.8II, and a Sigma EF-610 DG superflash