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Lexar High-Performance 633X 512GB MicroSDXC UHS-I Card
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Customer reviews
- Lexar High-Performance 633X 512GB MicroSDXC UHS-I Card
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- Customer reviews
Top positive review
Huge storage! Read at 70 MB/s and Write at 50 MB/s which is fantastic. Must have for 75 bucks!
May 2, 2019
Pro: Faster than expected. Benchmarked card with A1 SD Bench app. Consistently had a read speed over 70 MB/s and the write speed ranged between 55 and 45 MB/s. V30 certification means this card is certified for write speeds above 30 MB/s so this is at minimum running 50% past advertised for this limited benchmark. I've seen some reviews where this card can run consistently over 70 MB/s write speed if you win the silicon lottery. Impressive speed! I paid 75 bucks in April of 2019 so this was an amazing deal. Also good to support Micron!
Con: Not major, but card only reads as around 465GB of true storage (means it has 500 billion bytes not 512 billion bytes/476 real GB). Most cards go off 1 billion bytes per advertised gig, so this is a bit smaller than competitors (basically no one actually gives you 512 real GB). Filled card up with assorted files and the card filled up to 460 GB so the spacing is real. Overall still a great deal!
Con: Not major, but card only reads as around 465GB of true storage (means it has 500 billion bytes not 512 billion bytes/476 real GB). Most cards go off 1 billion bytes per advertised gig, so this is a bit smaller than competitors (basically no one actually gives you 512 real GB). Filled card up with assorted files and the card filled up to 460 GB so the spacing is real. Overall still a great deal!
26 people found this helpful
Top critical review
Buyer beware - Fakes are Out there!
September 10, 2018
I purchased the Micro SD Card from Amazon. It said Sold & Shipped by AMAZON. I received the package in a ZipLock pouch which obviously can be easily tampered with. It is a FAKE! I bought it for use on my Viofo A119 Dashcam. I records about 2 hours of video after which the files cannot be played back.
I couldn't understand if the issue was with the card or the camera. So, just to be on the safe side, I also ordered another card from B&H. This card was in its original packaging. The new card worked flawlessly on the dashcam.
Bottom Line: If you receive your MicroSD card in a Ziplock Pouch. Return it immediately because its a FAKE!
I couldn't understand if the issue was with the card or the camera. So, just to be on the safe side, I also ordered another card from B&H. This card was in its original packaging. The new card worked flawlessly on the dashcam.
Bottom Line: If you receive your MicroSD card in a Ziplock Pouch. Return it immediately because its a FAKE!
216 people found this helpful
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September 10, 2018
I purchased the Micro SD Card from Amazon. It said Sold & Shipped by AMAZON. I received the package in a ZipLock pouch which obviously can be easily tampered with. It is a FAKE! I bought it for use on my Viofo A119 Dashcam. I records about 2 hours of video after which the files cannot be played back.
I couldn't understand if the issue was with the card or the camera. So, just to be on the safe side, I also ordered another card from B&H. This card was in its original packaging. The new card worked flawlessly on the dashcam.
Bottom Line: If you receive your MicroSD card in a Ziplock Pouch. Return it immediately because its a FAKE!
I couldn't understand if the issue was with the card or the camera. So, just to be on the safe side, I also ordered another card from B&H. This card was in its original packaging. The new card worked flawlessly on the dashcam.
Bottom Line: If you receive your MicroSD card in a Ziplock Pouch. Return it immediately because its a FAKE!
August 6, 2018
This "64GB" card ruined a vacation as it only recorded the first 32GB of videos, and then "recorded" another 30Gb of blank/corrupted "files" - never stated an error, but all files show as unopenable - this is the classic sign of a hacked card misrepresenting its size by giving "files" a "size" in the file allocation table, but not really writing a file. The FakeFlashTest utility fails and shows only 32GB of the card as usable, and the FAT32 Format tool (which can format up to 2TB) cannot format the card and says the volume is corrupt. Every other attempt and utility to format the card in ANY capacity in any tool has proven fruitless - Windows format (Fat32, NTFS or exFAT) fails as well.
What a HUGE disappointment that will now last a lifetime! This card was sold directly from Amazon (not a 3rd party, and not a fulfillment only), so I assumed it was a legitimate quality card. I should have known when it did NOT come retail packaged, just came in a small ziplock pouch with a label.
What a HUGE disappointment that will now last a lifetime! This card was sold directly from Amazon (not a 3rd party, and not a fulfillment only), so I assumed it was a legitimate quality card. I should have known when it did NOT come retail packaged, just came in a small ziplock pouch with a label.
May 2, 2019
I previously bought a Lexar USB. It got corrupted after a month of usage, so I sent it to Lexar support through warranty. It died after a week. Their microSD is the same deal.
I decided to give them another chance because of the attractive price (cheapest 512GB compared to other competitors), but as the saying goes "some things are too good to be true". My microSD card, which I bought less than 12 hours ago, just got corrupted in less than a day of usage. Now this is not a fake counterfeit card; it's the genuine real deal. If the card gets corrupted this fast, how long before the card dies completely? I've used both Sandisk and Samsung microSD cards for years and had zero failures from both. How is it that Lexar cards and USBs have so much problem after using it for a short period of time?
Just save yourself the headache and spend the extra $10-$20 for quality products. Not this garbage product that Lexar likes to bait and switch people with.
EDIT: Just wanted to let everyone know, I tried to repair this the next day as I wanted to make this work as much as possible, but the card was completely DEAD. It's not recognizable on any device (phone, tablets, PC). This is garbage product and should be avoided at all cost.
I decided to give them another chance because of the attractive price (cheapest 512GB compared to other competitors), but as the saying goes "some things are too good to be true". My microSD card, which I bought less than 12 hours ago, just got corrupted in less than a day of usage. Now this is not a fake counterfeit card; it's the genuine real deal. If the card gets corrupted this fast, how long before the card dies completely? I've used both Sandisk and Samsung microSD cards for years and had zero failures from both. How is it that Lexar cards and USBs have so much problem after using it for a short period of time?
Just save yourself the headache and spend the extra $10-$20 for quality products. Not this garbage product that Lexar likes to bait and switch people with.
EDIT: Just wanted to let everyone know, I tried to repair this the next day as I wanted to make this work as much as possible, but the card was completely DEAD. It's not recognizable on any device (phone, tablets, PC). This is garbage product and should be avoided at all cost.
May 30, 2019
I installed this memory card in my Samsung Galaxy S9+ mobile phone. It worked properly but then failed catastrophically after 1 year of use. Neither my Samsung phone or my Dell desktop computer would recognize that the memory card had been inserted and so it could not be formatted or error-checked, etc. I would have lost all my photos and data if I had not performed a backup that was about 2 months old, so there was a loss of recent photos and data.
I contacted Lexar and opened a RMA to return it for replacement or refund. Lexar Tech. Sup. only offered to give me a refund, stating that a replacement was not possible; and that I did not need to return the failed memory card. I completed the odious RMA procedure but am still waiting for a refund 3 weeks later. I've emailed Lexar Tech. Sup. twice to follow up but still no refund. Also I paid Amazon $129.98 for this card however Lexar will only refund $79.99. Why?
This is latest reply from Lexar Tech. Sup.: "Thank you for contacting Lexar support. I wanted to apologize for the delay in processing your refund. We have been experiencing larger than normal turn around times due to logistical concerns while sending refund checks, and refunds via PayPal. It can take a few weeks to process new refunds. We hope to be able to process your refund very soon! I assure you that once your refund has been issued, we will be sending you a follow up email to notify you. We thank you for your patience and hope you have a great rest of your day!"
I contacted Lexar and opened a RMA to return it for replacement or refund. Lexar Tech. Sup. only offered to give me a refund, stating that a replacement was not possible; and that I did not need to return the failed memory card. I completed the odious RMA procedure but am still waiting for a refund 3 weeks later. I've emailed Lexar Tech. Sup. twice to follow up but still no refund. Also I paid Amazon $129.98 for this card however Lexar will only refund $79.99. Why?
This is latest reply from Lexar Tech. Sup.: "Thank you for contacting Lexar support. I wanted to apologize for the delay in processing your refund. We have been experiencing larger than normal turn around times due to logistical concerns while sending refund checks, and refunds via PayPal. It can take a few weeks to process new refunds. We hope to be able to process your refund very soon! I assure you that once your refund has been issued, we will be sending you a follow up email to notify you. We thank you for your patience and hope you have a great rest of your day!"
September 21, 2016
I bought this to replace the 64GB Sandisk in my Macbook Air. After a quick reformat, I begin to copy my files over to the new drive (using the included USB3 adapter).
About 5 minutes into the transfer, I get an error (-50) and it stops. OK, not to big a deal as I'll just reformat and start over. Well, my Macbook can reformat it, can't delete any files, in fact, it seems that the card has been "write protected".
Hmm, let me try it with my NiftyDrive adapter ... no go. Let me try with another SD card adapter ... no go. OK, maybe I can try on a older Macbook ... no go. Windows laptop ... no go. Last try, I'll use my digital camera ... no go.
Well, these things happen. I'll just replace it with Amazon. Two days and I get the replacement. Same. Friggin. Issue.
I'm getting a refund now. Wish I had read the more recent reviews. I should have just gotten the Sandisk. Oh well.
About 5 minutes into the transfer, I get an error (-50) and it stops. OK, not to big a deal as I'll just reformat and start over. Well, my Macbook can reformat it, can't delete any files, in fact, it seems that the card has been "write protected".
Hmm, let me try it with my NiftyDrive adapter ... no go. Let me try with another SD card adapter ... no go. OK, maybe I can try on a older Macbook ... no go. Windows laptop ... no go. Last try, I'll use my digital camera ... no go.
Well, these things happen. I'll just replace it with Amazon. Two days and I get the replacement. Same. Friggin. Issue.
I'm getting a refund now. Wish I had read the more recent reviews. I should have just gotten the Sandisk. Oh well.
May 2, 2019
Pro: Faster than expected. Benchmarked card with A1 SD Bench app. Consistently had a read speed over 70 MB/s and the write speed ranged between 55 and 45 MB/s. V30 certification means this card is certified for write speeds above 30 MB/s so this is at minimum running 50% past advertised for this limited benchmark. I've seen some reviews where this card can run consistently over 70 MB/s write speed if you win the silicon lottery. Impressive speed! I paid 75 bucks in April of 2019 so this was an amazing deal. Also good to support Micron!
Con: Not major, but card only reads as around 465GB of true storage (means it has 500 billion bytes not 512 billion bytes/476 real GB). Most cards go off 1 billion bytes per advertised gig, so this is a bit smaller than competitors (basically no one actually gives you 512 real GB). Filled card up with assorted files and the card filled up to 460 GB so the spacing is real. Overall still a great deal!
Con: Not major, but card only reads as around 465GB of true storage (means it has 500 billion bytes not 512 billion bytes/476 real GB). Most cards go off 1 billion bytes per advertised gig, so this is a bit smaller than competitors (basically no one actually gives you 512 real GB). Filled card up with assorted files and the card filled up to 460 GB so the spacing is real. Overall still a great deal!
July 2, 2019
This 512GB card should have been capable of storing 512,000,000,000 bytes (that is, 1,000,000,000 512-byte blocks) out of the box, before any long-term wear caused any segments of storage to fail. However, when I connected this card for the first time, it was only presenting itself to my system as ~996,000,000 512-byte blocks, so about 3% short of the advertised size. This was NOT an issue of converting between gigabytes (10^9's of bytes) and GibiBytes (2^30's of bytes), nor was this an issue of hidden partitions or other mostly-invisible data structures taking up space. My method of checking accounted for all that, and this device was still 3% short out of the box. I contacted Lexar tech support to ask if this 3% shortfall is normal, and they couldn't tell me if it is normal or not, so they couldn't guarantee that a replacement would have the full 1,000,000,000 512-byte blocks. So if you don't mind getting defrauded out of a few percent of space, go ahead and buy this product. Again, this was not the usual "1,000 vs 1,024" conversion that throws off most consumers, or the "some space is taken up by hidden partitions and on-disk data structures after you first partition it" that often throws off other consumers. This device was just well and truly 3% short of its advertised capacity.
May 30, 2019
I've tested 2 of these cards. My computer reads the card at ~460 GB. This translates to ~482 GB if you're using the 1000000 bytes is a gigabyte. Either way it's 30GB less than 512GB (about 5%) what you're paying for. It's effective read and write speeds are significantly slower than cards that are advertised even slower. For larger 5GB file writes expect failures (mostly video). Reads are just as bad. It is super cheap $75 at the time and the next 512gb card is $100. Expect to get what you pay for.
July 21, 2019
I got Lexar 633x microSD directly from Amazon (not Amazon Marketplace). It works as advertised or as good as SanDisk's which is $30 more expensive. I can't tell the durability at this point but so far so good.
-----------------------------------------------------------------------
CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 96.949 MB/s
Sequential Write (Q= 32,T= 1) : 79.082 MB/s
Random Read 4KiB (Q= 8,T= 8) : 14.932 MB/s [ 3645.5 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 5.232 MB/s [ 1277.3 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 14.813 MB/s [ 3616.5 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 4.884 MB/s [ 1192.4 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 2.477 MB/s [ 604.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 4.951 MB/s [ 1208.7 IOPS]
Test : 1024 MiB [H: 0.0% (0.0/460.9 GiB)] (x3) [Interval=5 sec]
Date : 2019/07/21 7:24:16
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
-----------------------------------------------------------------------
CrystalDiskMark 6.0.2 x64 (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 96.949 MB/s
Sequential Write (Q= 32,T= 1) : 79.082 MB/s
Random Read 4KiB (Q= 8,T= 8) : 14.932 MB/s [ 3645.5 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 5.232 MB/s [ 1277.3 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 14.813 MB/s [ 3616.5 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 4.884 MB/s [ 1192.4 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 2.477 MB/s [ 604.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 4.951 MB/s [ 1208.7 IOPS]
Test : 1024 MiB [H: 0.0% (0.0/460.9 GiB)] (x3) [Interval=5 sec]
Date : 2019/07/21 7:24:16
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
September 9, 2018
6.25GB, 2MB/s to 15MB?s, writes anything, reads 6.25GB back
backside of the micro SD shows a code that starts with MMBGS08 which identifies it as an 8GB card, but not lexar, which should be a code like LSDMI128 for this card.
h2testw confirms, all identifying information in the card has been removed and sizing info has been altered
typical fake SD card
the SD adapter should have been the Lexar high speed one, I got a generic cheap one that would never be able to support 40+MB/s transfers
test your cards, ppl :-)
backside of the micro SD shows a code that starts with MMBGS08 which identifies it as an 8GB card, but not lexar, which should be a code like LSDMI128 for this card.
h2testw confirms, all identifying information in the card has been removed and sizing info has been altered
typical fake SD card
the SD adapter should have been the Lexar high speed one, I got a generic cheap one that would never be able to support 40+MB/s transfers
test your cards, ppl :-)
There are 949 customer reviews and 1,020 customer ratings.
