I filmed in full HD videos on my 12-megapixel Canon Powershot over 30 minutes and put many pictures on it. Each time the transfer is done quickly, without error; Class 10 is therefore justified. This SDHC card I also used to transfer 32 GB of music in mp3 from my PC with Win 7 Home 32-bit on my indestructible and always excellent in sound quality Laptop HP Pavilion dv 1000 Win XP Sp3 in 2006. It serves as to boost the hard drive of the latter, which by its age only contains 80 GB.