The speed of reading and writing depends on the controller installed inside the flash drive. And here you are in for a lottery, as SanDisk puts different controllers at will. I took two pieces and in both cases on USB3.0 the read speed was 35-40 MB / s, the write speed was 10-17 MB / s in NTFS. Flash Drive Information Extractor could not determine the installed controller. Before buying, you will not be able to understand what is inside, PHISON PS2303 or, in my case, noname. My old Kingston DT Ultimate G2 on the same USB3.0 gives a read speed of 85-120 MB / s, a write of 70 MB / s. Whether or not to buy this SanDisk Ultra SDCZ48-016G is up to you.전체 리뷰보기