SanDisk Ultra 200gb microsd A1 @ amazon £49.49
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SanDisk Ultra 200gb microsd A1 @ amazon £49.49

£49.49£54.9910%Amazon Deals
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It blows my mind how this can fit 200gb on something the size of a fingernail.. remember those 1.44mb floppy disks
6ixFoot11 h, 38 m ago

The 128GB cards have 119GB available. Wondering if this has more more of a …The 128GB cards have 119GB available. Wondering if this has more more of a percentage missing.


Nothing is 'missing' - what you're seeing is a measurement difference.

Storage manufacturers typically describe capacity with 1GB defined as 1,000,000,000 bytes; however, Windows reports capacity with 1GB = 2^30 bytes = 1,073,742,824 bytes.

Therefore, a "128GB" card will be reported as 128×(1,000,000,000÷1,073,741,824)=119.2GB.

Similarly, a 200GB card will be reported as 200×(1,000,000,000÷1,073,741,824)=186.3GB.
29 Comments
decent price. it's usually a lot more than this
Great price
Good spot
Price is falling... ...how come 200GB rather than 256GB?
Does anyone know if this will be supported by most phones/dashcams/GoPro etc?
Krinkle1 h, 19 m ago

Price is falling... ...how come 200GB rather than 256GB?


Flash memory isn't limited by the power of 2 rule so they made 200gb just because
tangodelta1 h, 35 m ago

Does anyone know if this will be supported by most phones/dashcams/GoPro …Does anyone know if this will be supported by most phones/dashcams/GoPro etc?


I use this card in my NOTE 8 ,bought in december for £50 from amazon.Its a good card.
tangodelta2 h, 14 m ago

Does anyone know if this will be supported by most phones/dashcams/GoPro …Does anyone know if this will be supported by most phones/dashcams/GoPro etc?


Gopro only support up to 128gb
nauman471 h, 10 m ago

I use this card in my NOTE 8 ,bought in december for £50 from amazon.Its a …I use this card in my NOTE 8 ,bought in december for £50 from amazon.Its a good card.


what kind of write speeds do you get on the phone and usb card reader using this card?

i have seen mixed reviews some say about 30Mb other get just under 60 MB
Edited by: "shez786" 15th May
It blows my mind how this can fit 200gb on something the size of a fingernail.. remember those 1.44mb floppy disks
Krinkle4 h, 27 m ago

Price is falling... ...how come 200GB rather than 256GB?


Its common to sell higher capacity cards with faulty ‘sectors’ as lower capacity cards and/or they’re reserving them for use as wear leveling.
How many GB is actually available on this?
I remember not so long ago buying a 1Gb SD card for this price
Balls. I just paid £55 3 days ago.
Excellent price - good spot
a1b21 h, 9 m ago

Lots


Lots less than you'd expect....
Is this compatible with a Nintendo Switch?
a1b22 h, 52 m ago

Lots


The 128GB cards have 119GB available. Wondering if this has more more of a percentage missing.
shez7868 h, 22 m ago

what kind of write speeds do you get on the phone and usb card reader …what kind of write speeds do you get on the phone and usb card reader using this card?i have seen mixed reviews some say about 30Mb other get just under 60 MB


On a TF card reader,speeds upto 73Mb and didnt check inside phone,A1 stands for app performance which is good for smartphones i guess.
6ixFoot11 h, 38 m ago

The 128GB cards have 119GB available. Wondering if this has more more of a …The 128GB cards have 119GB available. Wondering if this has more more of a percentage missing.


Nothing is 'missing' - what you're seeing is a measurement difference.

Storage manufacturers typically describe capacity with 1GB defined as 1,000,000,000 bytes; however, Windows reports capacity with 1GB = 2^30 bytes = 1,073,742,824 bytes.

Therefore, a "128GB" card will be reported as 128×(1,000,000,000÷1,073,741,824)=119.2GB.

Similarly, a 200GB card will be reported as 200×(1,000,000,000÷1,073,741,824)=186.3GB.
Illusionary2 h, 19 m ago

Nothing is 'missing' - what you're seeing is a measurement …Nothing is 'missing' - what you're seeing is a measurement difference.Storage manufacturers typically describe capacity with 1GB defined as 1,000,000,000 bytes; however, Windows reports capacity with 1GB = 2^30 bytes = 1,073,742,824 bytes.Therefore, a "128GB" card will be reported as 128×(1,000,000,000÷1,073,741,824)=119.2GB.Similarly, a 200GB card will be reported as 200×(1,000,000,000÷1,073,741,824)=186.3GB.


You beat me to the explanation.


6ixFoot13 h, 57 m ago

The 128GB cards have 119GB available. Wondering if this has more more of a …The 128GB cards have 119GB available. Wondering if this has more more of a percentage missing.


As Illusionary explained, there's nothing missing. It's basically the difference between humans thinking/working with a decimal, or base 10, number system, where 'kilo' means 1,000, and computers working with a binary, or base 2, number system, where 'kilo' means 1,024, because that's the closest round number to 1,000 in binary.

So while we would think that 1,000 bytes makes a kilobyte (the way 1,000 grams makes a kilogram), most operating systems would say it takes 1,024 bytes to make a kilobyte and so 1,000 bytes is only 0.976 kilobytes to them - that's why some of the space appears to be 'missing'. Then we would think that it takes 1,000 kilobytes, or 1,000,000 bytes, to make a megabyte, but Windows would say it takes 1,048,576 bytes. By the time you get to gigabytes the difference looks even bigger but it is a consistent amount because it's 24 bytes per 1,000.

And the reason manufacturers using the base 10 definition when advertising hard drives, memory cards, etc. is supposedly because it makes it easier for humans to know precisely how many bytes of storage they're getting, but it's probably because it gives a bigger number of gigabytes.
reddragon10557 m ago

You beat me to the explanation. As Illusionary explained, …You beat me to the explanation. As Illusionary explained, there's nothing missing. It's basically the difference between humans thinking/working with a decimal, or base 10, number system, where 'kilo' means 1,000, and computers working with a binary, or base 2, number system, where 'kilo' means 1,024, because that's the closest round number to 1,000 in binary.So while we would think that 1,000 bytes makes a kilobyte (the way 1,000 grams makes a kilogram), most operating systems would say it takes 1,024 bytes to make a kilobyte and so 1,000 bytes is only 0.976 kilobytes to them - that's why some of the space appears to be 'missing'. Then we would think that it takes 1,000 kilobytes, or 1,000,000 bytes, to make a megabyte, but Windows would say it takes 1,048,576 bytes. By the time you get to gigabytes the difference looks even bigger but it is a consistent amount because it's 24 bytes per 1,000.And the reason manufacturers using the base 10 definition when advertising hard drives, memory cards, etc. is supposedly because it makes it easier for humans to know precisely how many bytes of storage they're getting, but it's probably because it gives a bigger number of gigabytes.


I know it's not missing but I thought I'd try and be simple. Thank you both for the explanation though
Apart from most android phones what other devices can you use this is? My dash cam, security-cam, nikon dslr and baby monitor all wont work with anything larger than 32/64gb
Dam that’s a deal 200
Do they actually not work with anything bigger than 64GB? Because pretty much all my devices SAY they won't work with a 200GB card (because for some of them cards that big didn't exist when they were made!) but all accept and see the storage on the bigger cards. I'm yet to find a device that rejects a large capacity card because of its size, but maybe I've just been lucky.
sio12 h, 24 m ago

Is this compatible with a Nintendo Switch?


Yes it is - I have one in mine
cabbagekitten6 h, 10 m ago

Apart from most android phones what other devices can you use this is? My …Apart from most android phones what other devices can you use this is? My dash cam, security-cam, nikon dslr and baby monitor all wont work with anything larger than 32/64gb


Android Tablet's.
Window's Tablet's.
Window's Netbooks (the one's that use eMMC internal storage, as opposed to HDD, and/or SSD).
AndroidTV Boxes.
Nintendo Switch.
Maybe a Raspberry Pi 3.x even? - I say maybe, as I'm not sure what the maximum MicroSD capacity/allowance on the newer 3A, and 3B Models are, as I own neither (or for that matter IF someone would be prepared/bothered to install such a massive capacity Memory Card in such a Device in the first place, etc?, lol).

They're probably other things there besides, but that's all I can think of off the top of my head at the moment anyway. :-)
ukflyboy3 h, 53 m ago

Do they actually not work with anything bigger than 64GB? Because pretty …Do they actually not work with anything bigger than 64GB? Because pretty much all my devices SAY they won't work with a 200GB card (because for some of them cards that big didn't exist when they were made!) but all accept and see the storage on the bigger cards. I'm yet to find a device that rejects a large capacity card because of its size, but maybe I've just been lucky.


That's both an interesting + valid point you raise above there really. :-)

A lot of Device's from x-Years ago, fall comfortably EXACTLY under the criteria as that of what you stated above (and pretty much for the reason's as to what you stated above also ... )

But like I also listed in my above/previous comment also, they're also a lot of 'stuffs' there too, that traditionally, wouldn't/shouldn't otherwise accept a capacity Memory Card BIGGER than that of what was otherwise stated on it's packaging, etc?.

On account of pretty much the reasons as to what you've stated above anyway, but yet ...

A case in point, about 1.5-2 Year's ago or so, there were some LINX 8 2GB RAM 64GB Internal Storage Windows 10 Tablet's selling at Sainsbury's for around the £80 mark + some LINX 10 Lite 2GB RAM 16GB Internal Storage Windows 10 Tablet's also selling at Sainsbury's for initially the £80 mark (then RAPIDLY fell to the £40 mark instead, etc).

Either way, both were featured in extensive Thread's upon HUKD here from 1 Month to the next (for BOTH Model's), as various people on here Posted, and re-Posted update upon update some more ...

But common throughout the bulk of those different Thread's was this (what I personally observed anyway), the LINX 8 was rated at a maximum Memory Card capacity of only 32GB, but many were sticking 64GB in there, and found that that worked perfectly regardless (despite that LINX 8 arguably coming out at around a time just shy of when 64GB MicroSD Card's now coming out or something?).

And in a similar vain is this also, the LINX 10 Lite was rated at a maximum Memory Card capacity of only 64GB, but many were sticking 128GB in there, and found that that worked perfectly regardless (despite that LINX 10 Lite also arguably coming out at around a time just shy of when 128GB MicroSD Card's now coming out too or something?).

So for some things, it pretty much comes down to pure trial and error I reckon?. :-)

But saying that though, testing such water's, you're obviously doing it at your own risk, etc, etc, yeh? (as such 'experiments' of such things in some Device's might end up throwing at you some recoverable errors at best, and/or damage the Device altogether at worse?), so bare such things in mind too?.

There is arguably a potential risk involved in such things, to both Device, and/or Memory Card itself, etc, etc? - that's something that shouldn't be randomly ignored I believe? (as loss of either 200GB Memory Card, and/or possible Device, could possibly prove an expensive experiment indeed? - of both Memory Card, AND Device, etc?).
So yeh.
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