Use now only Qumox SD cards for my digital photo and video cameras. Because still many customers do not know the difference between megabits and megabytes and can be branded vendors for the same card lyres 40 Euro and more out of his pocket, here again the Note. Megabits and megabytes are not the same. When describing data rates for digital cameras is usually argued with megabits. Probably also to unsuspecting customers overpriced SD Cards to turn. If a video camera with a data rate of 20 megabits records, which works out at 2.5 megabytes per second write performance! This card here writes up to 50 megabytes per second. So think before you buy. This card here, I even in my Ultra HD Camcorder Sony AX100 in use. Flawless performance without any errors. The UHD camcorder is recording at a resolution of 3840 x 2160 with 25 frames and 60 megabits, which is 8 megabytes per second write performance. And we remember uns..die Qumox creates up to 50 megabytes / sec. Even in large UHD camcorder with 200 MBit data rate is likely to run over loose when because the providers allow this and not their overpriced memory clutter forcibly turn on the client. So "easy" is an understatement in my example. Full description of the card with exFAT and just over 62 GB in a sole file ... no problem for Qumox. Reading goes with me with 85-86 megabytes / sec. Excellent.