Develop Bugs

Confused about MicroSDHC speed, performance, and adapters

I hope I posted this in the right section, I wasn't sure where a question about MicroSDHC cards would go here.
By the way, I live in the US.
I have been Googling this for days now, and coulden't find any conclusive information, especially since most of it was from random tech blogs and not respected tech/research sites.
I am looking to buy two MicroSDHC cards to use in a Photofast CR-5400 ( http://www.amazon.com/PhotoFast-CR-5400-MicroSD-Adapter-Dual/dp/B001I0T92Q ), speed and performance are pretty important as I will he handling a lot of data through it.
First of all before I start, anybody familiar with this adapter? Where would be the best place to purchase one so I don't wind up with a Hong-Kong bootleg? Ive had trouble purchasing flash memory online before from places like Amazon or Ebay where the memory was a bootleg that didn't perform anything like the real thing.
Now, I know that Memory Stick Pro DUO devices are generally faster than SD or SDHC devices, but AFAIK that device sets them up in a RAID 0 configuration so I am hoping that will help, this is why im trying to get the best performance MicroSDHC cards I can afford. And trying to get reliable information on these things has been a lesson in confusion.
First of all, it almost seems like the class speeds don't matter. Ive seen benchmarks that showed class 4 or class 2 cards outperform a class 6. Whats the point of these classes if they are so meaningless? How can a class 2 device have faster write speeds than a class 6? And is this classification only for writing or reading too? Why are the "ultra" models of some cards, which are supposed to be very high speed, listed as class 4?
Second, I heard that there are other variables that usually are not listed anywhere, such as Random Access Times, which from what I read are internal processes taking place in the card itself rather than having anything to do with the card reading/writing to whatever it is plugged into. And I really have no idea what else could be a factor.
I was looking at THIS Transcend card ( http://www.newegg.com/Product/Product.aspx?Item=N82E16820208475 ) mainly because the previous 8GB version ( http://www.newegg.com/Product/Product.aspx?Item=N82E16820208453 ) seems to be the best one you can possibly get, the 8GB model is class 6, rated as very high speed, and even has a low Random Access Time. But that doesn't mean that just because the previous model was good, the next one will be of the same quality, and on top of that I don't know if it'll even matter in that Photofast adapter or not. Not to mention its kinda pricey, don't forget that I will need to buy two as well as the adapter (though since the 16GB Memory Sticks came out at over $200 and they are barely around $100 now, and the 32GB still isn't out yet, I am going to assume it will still be at least $50 cheaper than just buying a 32GB Memory Stick............ when they come out).
So what would you recommend I do? Where can I find information that makes sense of this? Where can I find good benchmarks/testing done on these cards that on top of speed measures the other factors as well? Where would be the best place in the US, retail or online, to purchase such a 16GB MicroSDHC card for the best price?
Thank you for your time.

what are you using the Memory card for? (what application, video/photo taking, loading applications...)
Class X just says the minimum write speeds on an empty(defragmented) card... 2 means 2MB/s write, 4 means 4MB/s etc...
some SDHC cards also come with another rating... 133x that says max 20MB/s speed, depending on the manufacturer, that may be write or read speed
best place to buy is directly from Newegg/Tigerdirect, or from Amazon fulfilled by Amazon itself or a reputable merchant

paperWastage said:
what are you using the Memory card for? (what application, video/photo taking, loading applications...)
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As I said, I will be using it in my PSP.

Patriot 8gb class 4- very slow from pc to card ???
Anyone having any current luck with Patriot 8GB Class 4 micro sd's?
I copied everything from my PNY 2GB to my netbook. Very quick as expected...
Formatted the Patriot FAT32. Tried to copy back to the 8GB from the netbook and it was painfully slow. So slow it is not usable.
Both pc and Tilt recognizes the Patriot as 8gb.
Anyone having similar problems or any suggestions?

Possible formatting issue... No more Patriot SDHC.
I think I got it...
Took about 12-15 minutes to copy back to card.
It appears to be a formatting problem with the XP fomatting.
Used this... http://www.sdcard.org/consumers/formatter/
Tried the Wife's new HP laptop (school issued) last night and had the same problem. That pointed me to a possible card issue.
Moral of the story- google is your friend.
Just to be safe, I would stay away from Patriot's 8GB C4 cards.

I would just try another brand of microsd card. Sandisk are reputable but usually the most expensive, though on amazon 8gb cards can be had for less than 20 bucks. Kingston is another good brand.

Wintec 32Gb micro SD class 10 anyone tried?

Browsing newegg i found this card, Never heard of this brand. Anyone have any experience before? Class 10 for a 32gb micro sd seems like a real good deal to me.
http://www.newegg.com/Product/Produ...11&cm_re=micro_sd_32gb-_-20-161-411-_-Product

That's incredibly fast indeed. The class thingy is official, because it's just as an official label as an Full HD TV is Full HD. So you can't doubt about that.
How many formats it will survive is the question, but I think the quality of SD cards doesn't matter so much anymore (except the classes)

I am wondering about that as well. It says it has a lifetime warranty so that's great. Also I found this at Fry's (32GB MICRO SDHC CLASS 10, PATRIOT PSF32GMCSDHC10) for $109.99

I just bought two WINTEC 32GB Micro SDHC Class 10 cards at Fry's Electronics today, and so far they're working very well in both my Viewsonic G-Tablet and Samsung Galaxy Tab.
I haven't had time to benchmark the card(s) yet, but there's quite a noticeable difference in the performance of my Samsung Galaxy Tab.
So Far - So Good...

Well, based on just the reviews I've read on Newegg recently for Wintec-branded cards, I'd have to avoid them myself.
I was looking at the 16GB version of the card you're looking at now (Item=N82E16820161405), from Wintec and a Class 10. The feedback appears mostly negative, with many complaints about the card not functioning at all when the customer received it, several about it's speeds diminishing over time (under 6 months), several more about data corruption and/or complete failure occuring within a few months, and one unsettling one about Wintec blaming the customer for damage/abuse and refusing to honor their "Lifetime Warranty."
I can't speak from personal experience, and customer reviews are not 100% reliable, but there are enough people on Newegg dissatisfied with their Wintec MicroSD card to convince me to purchase another brand.

I have two of the 16GB Class 10 cards and they both are working pretty well. One is in my Nookcolor and the other in my Nexus One. Benchmarks were 18.7Mb/sec sequential read and 16.7Mb/sec sequential write. It's a good price and works well so if you are on a budget or just don't want to spend too much money for a card I would recommend these. Hope that helps.

Saw this on newegg for a pretty good price, a class 10 32GB card for $76 sounded good to me. While there are a few bad reviews I don't hold much stock in newegg buyers tbh. They aren't always the most technically proficient individuals and I always like to try things myself anyway. I'll be more than happy to fight to return the thing if it turns out to be bad. Hard to pass up this kind of thing .
Here's the newegg link in case anyone is interested. Mine will get here Tuesday so I will post back with a benchmark. Fingers crossed.
EDIT: After some google searching about similar cards from this company I found a thread on this forum about the 16GB model: http://forum.xda-developers.com/showthread.php?t=830491
If you skip to the last page you can see the OP and others had some problems with it. I figure I will stress the crap out of it when I get it, try and find any problems before the clock runs out on returns. I'll probably just write to the the entire card, read it all back, then erase and repeat until something bad happens. Im sure doing it this way I can recreate a month or two of use in just a day or so.

I just ordered on of these yesterday from newegg, I'll be sure to report back how well it works in my SGS once I receive it!

i have 3 32gb
2 x lexar 32gb class 10 at usd 84
1 x adata 32gb class 2 at usd 68
all work well.

kms108 said:
i have 3 32gb
2 x lexar 32gb class 10 at usd 84
2 x adata 32gb class 2 at usd 68
all work well.
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What file system did you use for those devices? I'm not sure what I should format my 32gb card as for my Droid 2. So far from what I have read from google searches it seems android doesnt support exFAT or NTFS which means no large file support :/. I could format it to ext3 or something but that would mean I couldnt use it on windows. Not sure what to do.
EDIT: Well I've been reading and writing to the whole card all day and so far no problems. Writes at 15MB/s and reads back at 20MB/s, pretty good. No corruption or slowdowns at all.

kms108 said:
i have 3 32gb
2 x lexar 32gb class 10 at usd 84
2 x adata 32gb class 2 at usd 68
all work well.
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i'm looking to pick up a lexar 32gb for my vibrant right now, where did you purchase yours from?

Oniyuri said:
i'm looking to pick up a lexar 32gb for my vibrant right now, where did you purchase yours from?
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hong kong locally, not mail order.

kms108 said:
hong kong locally, not mail order.
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Just wondering, how much did that run in USD?

its already stated in my previous post.

Damn, I guess those reviewers were right. Phone is crashing alot, all apps that use the SD card freeze up the second they start. It was working fine on my PC but my Droid 2 Global doesn't like it. Lame. Thank god for Youtube's return policy.

TRB01 said:
Damn, I guess those reviewers were right. Phone is crashing alot, all apps that use the SD card freeze up the second they start. It was working fine on my PC but my Droid 2 Global doesn't like it. Lame. Thank god for Youtube's return policy.
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stick with the usual brand, and you should be ok.
sandisk
adata
kingston
kingsmax
pny
jt
transcend etc.
and stay away from ebay.

I have been running one and while it is not stellar I get decent speeds with it. The write speed is 9.4 MB/s and the read speed is 19.9MB/s according to the sdtools app. It is noticeably faster than the class 2 card I was using. I have it formatted with fat32.

[Q] Samsung SDHC card query

Bit of a random question, this. I'm in the market for a new micro SDHC card, and was looking at Samsung cards - my Desire came with one (so they're good, from experience) and quite cheap too, but not so cheap I'm worried.
Anyway, this one: Samsung Essential 8GB Class 6 is, as it says, 8GB and a class 6. It's £9.99.
This one: Samsung Extreme 8GB Class 6 is also, as it says, an 8GB card with class 6 spec. It's £13.99.
Now, they're both the same class and both the same size and manufacturer. Are they essentially the same, or does the Extreme (other than the weather protection) do something that the Essential doesn't? (Which also lists all the same hardcore protection features the Extreme does)
I'm just a bit confused. Is there even a distance? Surely they'll perform the same? I'm aware classes is minimum speed spec but still.
Hopefully one of you will know!
Thanks!

I don't really know about samsung.. but I used to use a SanDisk Mobile Ultra 8GB Class 6 and I got R/W speeds of about 15mb/s! which is twice than what it *should* be.. it's actually the best sd I've ever had lol, would be a good thing to look for. It is abit more expensive though

Hehe, yes - I'd love to go Sandisk but I'm asking myself if I can even justify the £10 on the cheaper one. In the product description - and I'm not sure if this really /means/ anything in the real world, it says "24MB/s read speed is fast enough to satisfy even the most impatient data fiend."
I'm tempted to just go for the cheaper one to be honest!

Smii said:
Hehe, yes - I'd love to go Sandisk but I'm asking myself if I can even justify the £10 on the cheaper one. In the product description - and I'm not sure if this really /means/ anything in the real world, it says "24MB/s read speed is fast enough to satisfy even the most impatient data fiend."
I'm tempted to just go for the cheaper one to be honest!
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wow an advertised 24mb/s speed is awesome. I'd go for it!

I went for it! Here's hoping it performs as well as they say it does.
I've got Data2SD on my Samsung class 2 card that came with the phone at the moment, so I'm expecting to see an improvement. It's bearable as it is, but lags a bit too often!

Micro SD Card Questions

I recently pre-ordered the Sony Xperia Z2 which only comes in 16gb so I am forced to get extra storage, but I have a few question regarding micro SD cards. While reading my post please keep in mind I am still a noob. :angel:
1) Is 32gb enough or is it recommended to get 64gb? I will probably watch movies and TV shows but will not be putting music on the phone since I am not a fan for personal reasons. I have also heard that bigger SD cards can slow your phone down and some people tend to have problems with them, is this true?
2) What brand shall I get? SanDisk or Samsung? I have read that even though two micro SD cards are the same size and same class there is still a difference due to the brands.
3) Apart from the storage size and the class of the card is there anything else I should be looking out for?
Thanks

Fadeless said:
I recently pre-ordered the Sony Xperia Z2 which only comes in 16gb so I am forced to get extra storage, but I have a few question regarding micro SD cards. While reading my post please keep in mind I am still a noob. :angel:
1) Is 32gb enough or is it recommended to get 64gb? I will probably watch movies and TV shows but will not be putting music on the phone since I am not a fan for personal reasons. I have also heard that bigger SD cards can slow your phone down and some people tend to have problems with them, is this true?
2) What brand shall I get? SanDisk or Samsung? I have read that even though two micro SD cards are the same size and same class there is still a difference due to the brands.
3) Apart from the storage size and the class of the card is there anything else I should be looking out for?
Thanks
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Hm....the xperia z2......it has up to 128 gb memory expansion according to gsm arena. If you want to save movies and tv shows to your phone, I suggest you buy a 64 gb memory stick, so you can save more stuff. As for the brand, there's no actual difference to me, and as for the bigger size that makes the phone slower, that's not true, unless you have your memory stick full of stuff like music, videos/movies/tv shows, images and such stuff (note that I have mine with such stuff loaded and I have no problems). Apart from the storage size and the card class, no, I think you're going to be alright. Hope I helped...

if you are a Movie TV fans,i suggest you add a 64gb extra storage,then u could smoothly enjoy the show and u can save more tv show you like

I agree, i fill up a 32 gb like its nothing. and thats just pictures and videos. if you use instagram it fills up allot faster.

Alright, I'll go for the 64gb one and Samsung seems like the reasonable choice to make.

suggest you to get a 64GB extra storage.
and maybe kingston is ok.

Fadeless said:
Is 32gb enough or is it recommended to get 64gb? I will probably watch movies and TV shows but will not be putting music on the phone since I am not a fan for personal reasons.
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We can't really answer that. If you don't re-encode movies you'll likely quickly fill up 32GB. On the other hand, bigger cards get cheaper, faster and more reliable (ok, not always) over time. I'd decide by price, you can always easily replace it later.

go for sandisk ....class 10 ultra ...64 gb . actually you have video recording @ [email protected] will going to take more speed as well as memory than expected .

i have got Samsung micro SD class 10 48mb/s 32 gb huhuhuh! it's cool and works fine!

128 gb micro sd card
Tryn to figure out where to sell my new unopened 128gb micro sd card.
I just sold my vzw note 2 and 2 days ago had Ordered the sd card at best buy will sell for $105 shipped it is new unopened in pack
Here is link to best buy,..
http://m.bestbuy.com/m/e/product/de...cf0-a561-6149-a31a-00002dd127e5&pid=121909834

64
64 GB is the way to go, bigger the better !!
:laugh:

HUGE Micro SD Cards

First do yourself a favor and tape your micro SD card to the phone with a little piece of Scotch tape. I received the 200GB SanDisk Ultra for free when I purchased the V10 and unfortunately while swapping batteries in the dark the Micro SD card came loose and fell out. Huge bummer given the cost.
Spilled milk aside I've decided to replace it with a Samsung Evo Plus 256 GB micro SD (true usable 238). They can be had on ebay for about $70-90. The 200 GB SanDisk Ultra is about the same. Crazy because these things were nearly $200 early in 2015. I happened to have 64 GB Samsung Pro but quickly filled it up with my YouTube Red subscription and Google Play movies and surprisingly there weren't as many videos as I thought would fit. So I figure go for the big Kahuna.
I decided on Samsung after reading that they had had a better track record with stability than SanDisk.
Anyone else using the 256 Samsung how good is 95mb/s for a power user phone like this? Is there lag? There seems to be a great deal of variance in performance for micro SD which does not entirely square with price.

I am pretty sure most Note 7 users have 256s.... Me & My wife have them installed. Haven't run test. It works... Holds all my pics, movies and roms.

95 (MB) OR (Mb)/s. Huge difference. And I don't know of any phone that will do the rated MB. I usually get 12-25MB out of my 128/200GB cards, usually around 15ish. That translates to about 96Mb-160Mb/s. The new UFS cards Samsung started talking about will probably get close to SATA3 speeds which amounts to around 500MB/s, which in real life will probably mean a out 3-400MB/s and I am being optimistic. Nonetheless when phones start coming out with UFS micro slots they should be as snappy as internal storage, mostly. Random IOPS will probably be a lot better but less than 100MB/s I would guess.
And I am talking about phones. Rated speeds will usually be about 20-50% of advertised speed. Closer to 80% or so in a computer. OEM's tend not put the best hardware for micro SD cards in phones. I would guess because of real estate and possibly heat and battery. Nonetheless, I hadn't planned on buying the V20 but the multimedia capabilites were too hard to pass up and my final cost after promotions and a couple of phone sales will probably be less than $400. If I include amps and DACs closer to $200. My next phone will have UFS for micro slot. No doubt.

Won't UFS come at a much higher cost premium and will the practical speed improvement for phone storage really justify the cost if the prices for these huge capacity micro SD's are collapsing?

ebay... microsdcard.... "remembering buying memorystick and it was fake"... -_-

Just ran a benchmark on my Samsung Evo plus 256. Got 80 MB/s read, 40 write.
Sent from my LG-LS997 using Tapatalk

The new microSDs are rated pretty fast. 90mb/s both read and write
I'm just uncertain if the v20 is able to make use of these speeds.
ie. is the v20 the bottle neck?

If I remember, seeing that UHS 3 cards have two rows of pins on them for faster transfer speeds, but I don't believe any phone supports that second row of pins yet.

Oh yea i forgot to mention that i almost had a similar incident you had. Upon recalling my note 7 I put my memory card in that plastic casting and in my pocket.... somehow the memcard slip out and out of my pocket.. Luckily after searching around I call best buy and ask my old coworkers if they see any memcard around and they did =D... it be bad if they didn't.....

Maybe ill lost this here as I didnt get much feedback in the questions section. I have a 128 gb SDXC micro sd that worked fine on my v10 but isnt even showing up as a option on my v20 . the settings app only shows internal storage. I really dont want to format it but guess might have to . but I have a lot of files on there and don't want to transfer them as even deleted on a computer they still leave a trace
$oul€$$ D€m0n!

Was that sd card encrypted on the V10? If it was you can only read on the device you encrypted with.
Sent from a TMo V20

Yeah the reason you see those cards for that cheap is because Samsung flooded the market with 256gb cards with the Note 7 and then S7/Edge promo where they gave them for free. I have 2(one in my V20) and am selling my second one (hopefully today) for $80

nest75068 said:
Yeah the reason you see those cards for that cheap is because Samsung flooded the market with 256gb cards with the Note 7 and then S7/Edge promo where they gave them for free. I have 2(one in my V20) and am selling my second one (hopefully today) for $80
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LG figured rather than offer another free 200 GB SanDisk card the V20 buyers can buy all those Samsung 256 GB cards flooding Ebay and sell the B&O headphones to offset. Thanks Samsung!

Download this app once you buy a new micro SD.
It tells if what you got is really what you paid for
SD insight

vagelis said:
Was that sd card encrypted on the V10? If it was you can only read on the device you encrypted with.
Sent from a TMo V20
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No I dont encrypt my sd cards. But I can read it in the v10 which I sold and on ny computer.
$oul€$$ D€m0n!

does anyone here use a SanDisk EXTREME® PLUS 128 GB microSD™ UHS-I class V30 CARD?? wanna know if its compatible with V20. appreciate your feedback and response, thank you!

pan_zhengwei said:
does anyone here use a SanDisk EXTREME® PLUS 128 GB microSD™ UHS-I class V30 CARD?? wanna know if its compatible with V20. appreciate your feedback and response, thank you!
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All micro sd cards are compatible with the V20.

I can confirm that V20 can't read micro SD UFS-1. I bought Samsung 128GB micro SD EVO+ and Kingston 128GB micro SD UFS-1, but both can't be detected by V20. I feel very strange and confirm that these two card can be read by V10.

craig_shih said:
I can confirm that V20 can't read micro SD UFS-1. I bought Samsung 128GB micro SD EVO+ and Kingston 128GB micro SD UFS-1, but both can't be detected by V20. I feel very strange and confirm that these two card can be read by V10.
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You have defectives cards

kms108 said:
You have defectives cards
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Wrong! These two cards are brand new and can be used on PC ,V10 or my wife"s Samsung Note 3. Unfortunately, my V20 can't support them.