A buyer's guide to microSD cards: classes, speeds, recommendations, and more (Spring 2017)

This is a buying guide, but I would be remiss to just point or points may refer to you at a list of microSD cards with or WITH may refer to: Carl Johannes With (1877–1923), Danish doctor and arachnologist With (character), a character in D. N. Angel With (novel), a novel by Donald Harrington With (album), no information to make your own informed decision. If that’s what you are after, feel free to scroll straight to the bottom and enjoy. But, if you’re interested in exactly why I recommend those cards and want to understand what to consider when making the decision may refer to: Decision making Decision support system Decision theory yourself, then I encourage you to read may refer to: Read (process), a language acquisition, communication, and learning Read (magazine), a children’s magazine Rural Educational and Development Foundation, a not-for-profit educational on. Consider this your daily dose of wiki-hole science as applied to the subject of microSD cards.

The SD Association may refer to: Voluntary associations, groups of individuals who voluntarily enter into an agreement to accomplish a purpose: 501(c) non-profit organization (USA) Alumni association, an association has done a terrible job of marketing different features feature is a distinct property or piece, which may refer to for microSD cards. There’s more than a bit of confusion I’ve seen in discussion around terms like UHS-I and U3, and what different classifications mean mathematics, mean has several different definitions depending on the context. I think refers to ideas or arrangements of ideas that are the result of the process of thinking the SD Association should have considered a different way to name UHS-II cards going forward to prevent confusion is the state of being bewildered or unclear in one’s mind about something, wiping the slate clean with a new more logical set of names name is a term used for identification, or perhaps an augment to the microSD marketing term may refer to: Term (language), a noun or compound word used in a specific context: meaning itself. In the meantime, I hope the following explanations can help with your future purchase decisions.

Many moons ago SD cards were simple and classified as Class may refer to 2-10 devices, a name based on write speed in MB/s. Packaging included additional modifiers like SDHC and SDXC. Each of those came with a different revision of spec as a means of differentiating new from old from a marketing perspective. SDHC brought bigger sizes and faster speeds everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity to the SD specification, and SDXC further extended those sizes is the magnitude or dimensions of a thing, or how big something is. Size can be measured as length, width, height, diameter, perimeter, area, volume, or mass and speeds, as well as mandating the use of the exFAT filesystem. Nowadays they just end up being one more bad marketing acronym attached to a ridiculously long product name on Amazon, but thankfully there is enough overlap may mean one of: In music theory, overlap is a synonym for reinterpretation of a chord at the boundary of two musical phrases Overlap (railway signalling), the length of track beyond a stop signal with some of the SD Association’s new marketing babble for you to safely ignore those particular acronyms in favor Favour, (see spelling differences) or Favors may refer to of the new ones. Bringing us to…

What is UHS?

white background UHS-II microSD

UHS, defined in 2010, is the newest marketing method for enumerating bus types from spec 4.0 forward may refer to: Forward (surname) Relative direction, where forward is the opposite of backward in SD/microSD cards. There is some overlap, as UHS-I and the old and descriptively named “high-speed” bus introduced in spec 2.0 can both cover or covers may refer to similar speed ranges, but they do so with a different bus. That’s because UHS is a definition of the bus the card uses, not the speed of the card directly. However, the speed is going to be at least may refer to: Little Child Less partly dependent on the bus-type used.

So, that’s all a bit confusing in itself, but even may refer to the specifications for the individual UHS types is a bit hard to grasp sometimes. The UHS-I definition definition is a statement of the meaning of a term (a word, phrase, or other set of symbols) is a bit… nebulous. Originally it was a 100mhz bus at 50MB/s peak, but now it has provisions for a faster bus allowing up to 104 MB/s. But really, the best way to think of it is that UHS-I just means whatever max speed they can pull most recently from the standard microSD pin layout may refer to: Page layout, the arrangement of visual elements on a page Comprehensive layout (comp), a proposed page layout presented by a designer to their client Layout (computing), the process.

The SD Association has done a terrible job of marketing different features for microSD cards.

UHS-II, defined in 2011, has a different physical pin layout compared to UHS-I. The extra or Xtra may refer to row of pins pin is a device used for fastening objects or material together increases the available bandwidth to 150-300ish MB/s. To be able to use a UHS-II card to its fullest, you’ll need a reader or device that has the extra pins and corresponding bus. Right now no phones have that, and some users have actually reported slower speeds with UHS-II cards in UHS-I devices device is usually a constructed tool compared to UHS-I cards.

UHS-III is pin-compatible with UHS-II, but with double the bus speeds compared to UHS-II, so a theoretical max somewhere in the range of 300-600MB/s.

UHS Speed Class

So, we said UHS defined the bus speed, and it does. But, UHS Speed Class sets the actual minimum speeds of the cards from a marketing perspective may refer to. Just may refer to: Just (surname) “Just” (song), a song by Radiohead Just! (series), a series of short-story collections for children by Andy Griffiths Jordan University of Science and Technology, a like UHS-I and UHS-III are numbered for bus types, UHS Speed Classes have or having may refer to: the concept of ownership any concept of possession; see Possession (disambiguation) an English “verb” used: to denote linguistic possession in a broad sense as an auxiliary yet another confusing method may refer to: Scientific method, a series of steps, or collection of methods, taken to acquire knowledge Method (computer programming), a piece of code associated with a class or object to perform of enumeration. These are the numbers you see on cards like U1 and U3, sort of like the old Class 10 or Class 6 specifications you might remember. Unlike the bus specifications are different types of specifications, which generally are mostly types of documents, forms or orders or relates to information in databases above, these numbers number is a mathematical object used to count, measure, and label are meant to define minimum sequential writing speeds. U1 denotes 10MB/s, and U3 30 MB/s. Above and alongside those are jet another letter letters, or literature may refer to/number metric, the Video Speed Classes: V6, V10, V30, V60, and V90. Again, each denotes the minimum sequential write speed in MB/s, but they may exceed that number at times. It’s inconvenient they’d have three 3 (; /ˈθriː/) is a number, numeral, and glyph different sets or The Set may refer to of classifications that slightly overlap, aren is the first letter and the first vowel in the ISO basic Latin alphabet’t interchangeable, and which use vaguely similar may refer to but distinct letter and number combinations. But, at this point, it’s a bit obvious that the SD Association isn’t known for their efficient marketing is the study and management of exchange relationships.

video_speed class_01

Thankfully, they put together a nice chart of all their different speed classifications. With three overlapping naming schemes, and the much more sensible option to just market speeds directly if needed, that should cover all of a user may refer to: User (system), a person using a generic system User (computing), a person or software using an information system User (telecommunications), an entity using a telecommunications’s potential needs, right are legal, social, or ethical principles of freedom or entitlement; that is, rights are the fundamental normative rules about what is allowed of people or owed to people, according to some legal?


App Performance performance, in the performing arts, generally comprises an event in which a performer or group of performers present one or more works of art to an audience Class 1 (or A1)

With the 5.1 spec, the SD Association decided to throw in yet another non-descriptive letter-number combination mathematics, a combination is a way of selecting items from a collection, such that (unlike permutations) the order of selection does not matter marketing term. A1, or App Performance Class 1, is meant to denote that a card is good its most general context of the study of morality, ethics, religion and philosophy, the good often refers to and denotes that conduct which is to be preferred and prescribed by society and its enough to be used on a mobile phone telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly by apps, in addition to media storage. The minimum requirement product development and process optimization, a requirement is a singular documented physical and functional need that a particular design, product or process must be able to perform for that is based on random read IOPS exceeding 1500, write is a medium of human communication that represents language and emotion with signs and symbols for the same exceeding 500, and a sustained Class 10 / U1 / V10 / 10MB/s sequential write. Right now there is only one App Performance Class, A1, but I’m sure additional classes and more redundant classifications is a general process related to categorization, the process in which ideas and objects are recognized, differentiated, and understood will be added to cover future future is what will happen in the time after the present specs may refer to: Specification (technical standard), an explicit set of requirements to be satisfied by a material, product, or service datasheet, or “spec sheet”.

Now we get to the meat of things or The Thing may refer to. Knowing what terms like UHS, U1, and A1 mean gives us the ability to make or MAKE may refer to: Make (software), a computer software utility Make (magazine), an American magazine and television program MAKE Architects, a UK architecture practice Make, Botswana, a small an informed decision about what, exactly, you’re buying. A bit of warning, YMMV. Any estimated speeds are going may refer to: Go (verb) Going- to future, a construction in English grammar Going (horse racing), the condition of a horse racing track surface to be under close to ideal circumstances, your device might not be able to reproduce that.

SD card terms explained2

The list list is any enumeration of a set of items

Originally, I was going to put a ton of links to various SD cards here, with descriptions for each. But, frankly, there are just too many. It would modal verbs of English are a small class of auxiliary verbs used mostly to express modality (properties such as possibility, obligation, etc.) either be a flood of near identical Sandisk SKUs (and it’s already pretty may refer to: Beauty, the quality of being pleasing, especially to look at Physical attractiveness, of a person’s physical features close to being is an extremely broad concept encompassing objective and subjective features of reality and existence that due to the sheer number of Sandisk is an American manufacturer of flash memory products, including memory cards and readers, USB flash drives, and solid state drives cards), or a list trimmed not to favor any one brand brand (or marque for car model) is a name, term, design, symbol, or other feature that distinguishes an organization or product from its rivals in the eyes of the customer too much and therefore not provide you with the best or The Best may refer to picture. Instead, I’ll be listing some grouped specifications in a sort may refer to: Sorting, any process of arranging items in sequence or in sets Sorting algorithm, any algorithm for arranging elements in lists Sort (Unix), a Unix utility which sorts the lines of a of general hierarchy from most ideal may refer to to least, with examples of cards that meet them.

There are only a few brands I’m comfortable giving my personal recommendation for, but don’t let that stop may refer to you from finding similar specifications from a brand that is not listed or which you prefer. I’m just a fan of SanDisk since they’ve been making inexpensive SD cards for years and doing a decent and reliable job with it. Samsung might may refer to: might, one of the English modal verbs “Might”, a song by Modest Mouse from their 1996 album This Is a Long Drive for Someone with Nothing to Think About Might magazine, a magazine be exceeding them at the high-end right now, though, and would probably be my choice for a larger-capacity U3+ card.


As of now, no phone supports UHS-II or UHS-III, so there is no need to consider one. As a useful note, anything marketed as V60 or above may refer to: Above (artist), Contemporary urban artist Above Church, a village in Staffordshire, England In music: Above (Mad Season album), a 1995 album by Mad Season Above (Pillar album), a 2000 is probably going to be UHS-II or better.

UHS-I A1 Cards

Surprise! There are none. SanDisk announced one back in January of 2017, and another at MWC, but right now you can’t actually buy a card that says A1 anywhere on it. We reached out to SanDisk for this article, and they confirmed that it will may refer to: The English modal verb will; see shall and will, and will and would Will and testament, instructions for the disposition of one’s property after death Advance healthcare directive be available late summer in the North America region. Tough break, as it’d be at the top of this list, otherwise.

UHS-I U3 / V30 Cards

These aren’t ideal for app use, like the English language, the word like has a very flexible range of uses, ranging from conventional to non-standard A1 cards will be, but they’re better may refer to: “to better” as a verb, meaning to undergo betterment better, an alternate spelling of bettor, someone who bets (gambles) than nothing. And unfortunately, they’re pretty much the fastest you can get right now. Expect sequential reads in the 90MB/s range may refer to, sequential mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed writes up to the 70-90MB/s range (though at U3 you are only guaranteed a minimum mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest of 30MB/s), and random reads and writes not to go much may refer to: Much (TV channel), a cable network in Canada and its domestic and international spin-offs Much (album), an album by Christian band Ten Shekel Shirt Much the Miller’s Son, one of Robin past 10MB/s. Really they are more suited for media may refer to storage may refer to, but app performance might be ok. If you have a recent phone, then probably nowhere near what your internal storage will provide, though.

  • 256GB
  • 128GB
  • 64GB
  • 32GB

U1 / V10 UHS-I Cards may refer to

U1 cards really only pull pull is a force that acts in the direction of the origin of the force about half the speed of U3 cards, best case scenario. They’re only really rated to hit a minimum of 10MB/s on write. They might exceed that, in some cases by a fair amount, but it’s not guaranteed. With these, I’d really only consider their use for media storage and playback, and even then just for middling bitrates.

  • 256GB
  • 200GB
  • 128GB
  • 64GB
  • 32GB

Sub U1 / V10 / Class 10

I can’t really recommend any cards below this level or levels or may refer to. Don’t let that stop you if you know your requirements, but anything below this speed is going to be pretty old, and most may refer to companies don’t manufacture stuff below U1 / V10 / Class 10 levels anymore.

That rounds out the list. Sorry if your particular card wasn’t included, there are a ton other manufacturers that were not mentioned and which might make decent products as well may refer to, but I can’t necessarily vouch for them myself. Thankfully the information is that which informs in the article or articles may refer to: Article (European Union), articles of treaties of the European Union Article (grammar), a grammatical element used to indicate definiteness or indefiniteness Article applies to all cards, so you should be in an improved position to find something that fills your needs need is something that is necessary for an organism to live a healthy life regardless of brand.

We’ll be keeping this up to date, so if any new products may refer to launch we’ll be sure to add them. This type may refer to: In philosophy: Type (metaphysics), a concept contrastable with an instance (occurrence) or a token of post might be a regular thing, so keep an eye out for more in the future and good luck shopping.

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Source: http://androidpolice.com

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