Steven R. Roth "AKA GeneralEclectic"
Once you cut and pry your way through Sandisk's packaging, you will be rewarded with a nicely-made and high-performing MicroSD UHS1 flash memory.  It comes formatted to SD.org's standards in FAT32, so it's ready to go for most applications.  My single gripe about this product is that they have omitted the usual small plastic box that holds the card and adapter.  I use those!  Since I frequently switch cards between uses, and frequently have them in storage, those little boxes are very useful.  It's way too easy to lose a MicroSD.Anyway, here are the results from ATTO disk benchmark:Settings (anticipating digicam use): Total length 64MB Overlapped I/O and QD=4 (but it never exceeds 1)Segment Size in Kbytes, Read/Write in Kbyte/secSize  Write  Read.5  9904  163431  14555  170332  13454  273244  14194  353378  15065  3985316  14154  4062932  14277  4295764  13212  44291128  17567  44247256  16209  44442512  15391  444421024  17408  444422048  16229  44442[Sorry for the ugly table, Amazon does not support consecutive spaces, including alt-255, or embedded tabs]This is very fast for a MicroSD.  It's not quite up to what Sandisk achieves in full size UHS1 SD cards that can write over twice this speed, but those are electronically more complex cards. The Micro form factor likely doesn't permit the additional hardware to achieve speeds comparable to the larger cards.  Note that the read speed is a lot faster than what Sandisk promises.  (Note also that you will NOT achieve these speeds with a USB2 reader.  You will need either a USB3 or built-in PCIe reader to get accurate results.  So do not complain to me if you use a USB2 reader and don't achieve these speeds.)In any event, you'd be hard-pressed to find anything faster.My personal experience with Sandisk products is very good.  That is, I've never had anything fail on me.  Given the very reasonable prices of these, I rate them as Highly Recommended.