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I don't know why people DON'T post fast 128GB cards but added three.
Guys, please understand that these memory cards are NOT for your average phones / devices. These cards are for HD / 4k video captures as well as photography shoots. I work with HD video and 4k occasionally. To put things into perspective, 1 min and 5sec of 4k video = 32gb of data. A 1080p timelapse of 5 mins @10x standard time = roughly 10gb of RAW files (individual pictures).
In a phone you won't see as much of a difference between the speeds. Mainly if you're moving massive amounts of data such as your entire music collection or a few movies. Usually better to do that via a card reader, although phones are getting faster transfer speeds. Most devices built in the last 3 or 4 years will be able to use any of these. SDXC was "introduced in 2009" so yeah 3 or 4 years and you're good all the way up to 2TB. As for why I would want one of these, mainly for my cell phone, because it's a lot easier to retrieve my data if my phone gets smashed, water logged, or inoperable by just pulling out the sd card. :)
why wold you buy the 128 gb version its slower and who needs that much space?
The SanDisk Micro SD Extreme PRO 64GB UHS-I/U3 Micro SDXC is much, much faster than the SanDisk Ultra 128GB MicroSDXC Class 10 Memory Card (most voted one). It is more than 3 times as fast! So I would pick the SanDisk Micro SD Extreme PRO 64GB UHS-I/U3 Micro SDXC. You get half the storage, but 3 times the speed. And who needs more than 64 gb of external storage??
Added the SanDisk Extreme to vote. Newer model with three times min write speed and twice the max read speed of the ultra, and only $12 more.
Given the nature of most modern devices, fewer people will ever get to actually use these.
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A lot of new hardware doesn't support expandable storage space. This becomes a problem if you have, say, a very large collection of music, where few modern mp3 players actually have SD card slots (let alone support for SDXC). Granted, I believe there are a lot of modern android phones with SDXC support, but then you're given sub-par battery life, compared to dedicated products like the classic iPod models which can easily last a couple weeks before needing to be charged, assuming light to moderate usage. Anyways, I think modern consumer electronics are trying to move towards bare-minimum onboard flash RAM storage, and then encourage you to just stream/host all of your media through a cloud service.
Dragonzeanse
0
Exactly!..