I just inserted this newly purchased micro SD card into the slot of my 2012 Sony VAIO S laptop. I copied the contents of my old phone SD card (already on the laptop hard drive) to this new 16GB Transcend Class 10 card. The content is very diverse, ranging from hundreds of small Android files to dozens of medium-sized (10MB) MP3 files and a dozen not-so-large (60MB) videos. The copy was made in Windows XP with the usual drag'n'drop. Files copied: 1233. Total size: 3.33 GB (3,577,251,119 bytes). Elapsed time: 6'42" (or 402")-------------------------- ----------------------- ---Average Speed: 8.9 Mbps Here is my bottom line. Accordingly, some would deny its "Class 10" status. But how can you be sure that the bottleneck is not somewhere else, such as E.g. SD drive speed, virus scanning of moved files or other factors? I don't know for sure, so I'll leave the reader to guess. One final note: I particularly like Transcend's included Micro SD adapter (I got the same one from a previous Transcend and keep it in my laptop compartment). all the time, for practical reasons). I've seen a lot of poor quality adapters so this is worth mentioning.
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