This Class 10 UHS-I microSDXC card is built for Android smartphones, tablets, and cameras, offering solid performance for everyday use. It’s a great pick for storing Full HD videos, photos, apps, and more—especially if you want reliable storage without paying premium prices. ✅ Pros Up to 140MB/s read speed – fast file transfers and app loading A1-rated – optimized for app performance on Android devices Includes SD adapter – fits laptops, DSLRs, and card readers Durable build – waterproof, shockproof, X-ray proof, and temperature resistant Wide compatibility – works with microSDHC/microSDXC devices and Chromebooks ❌ Cons Write speed is slower – typically around 10–14MB/s, not ideal for 4K video Not U3 or V30 rated – limits use with high-end cameras or drones Performance varies by batch – some users report inconsistent speeds No encryption or recovery software included – unlike SanDisk Extreme models

I'm an IT Professional and I've stored my music, ebooks, pictures and documents in the cloud (like Dropbox, GDrive, One Drive) and It's about 70GB altogether. Cloud-based solutions are great but annoying when you're on the move and can't access a file because of network connectivity issues. Having a copy on an SD card for instant access of all my essential items seemed the logical choice. I've used SanDisk in the past without any issues and they know the criteria for any SD card should be: A) Big enough for your current storage needs and has additional space for expansion as your data grows. B) Fast. A slow SD card will just lead to eventual frustration with unreliable transferring and lag when accessing your files. C) A quality company, if you are spending money on a card, you want to know it's reliable, robust and keeps your data safe. SanDisk doesn't manufacture TV's or PC's. Its core business model is memory. If you want the best that money can buy, stick with the experts. This Sandisk Card, in my opinion, gets tops marks for fulfilling all of these requirements. 6 Important Tips and Hints: 1) Formatting. It comes formatted in exFAT. Do NOT reformat it. Leave it as it is. I know NTFS is supposed to be faster and allows bigger file sizes, I tried to format mine to NTFS and my new android phone didn't recognise it. I put it back into my PC to reformat it again and bizarrely it wouldn't allow me to. ( perhaps some weird driver issue on my machine) Luckily I have another brand new PC that it did allow me to reformat back to exFAT. Just a heads up to avoid unnecessary drama. 2) Creating a Copy Of Your Cloud Files for Offline Use. I was unable to specify where Gdrive, Dropbox and One Drive are stored on my (not rooted) phone. I wanted it to point to my SD card so I could store everything in one place using the files and folders structures I created. None of the Cloud Solutions I use would allow this. As a viable workaround, I've created a manual copy of my Cloud Storage in the SD Card and perform a manual sync every couple of months to ensure I have an up-to-date copy of my cloud items. I suspect the issue is not going to be made any easier as these companies want to lock you into their cloud plans and be your one stop shop solution for the storage of your data. 3) Difference between the advertised size and the usable space on the SDcard In the background an algorithm runs on the card to ensure that wear and tear on the card is evenly spread out to make your card last longer. If an error occurs resulting in a bad sector on the card it swaps out space it's saved for itself and gives it back to you. Both these events occur to ensure that your card remains stable, lasts longer and keeps your data safe, In order for these actions occur the card needs to keep some space on the card for itself in order for this to happen. 4) Packaging. If you go for the standard packaging instead of frustration-free ( I always do to check it's legitimate and not a cheap knockoff) make sure you have a pair of scissors or a knife on hand to get the card out. This may seem obvious, but you run the risk of breaking the sd card if you can't wait to try out your card and twist the packaging with your hands to get the card out. 5) Transferring Files from Your PC using the Micro SD Adaptor or FTP. To Transfer files from your computer to your tablet or phone you can use the Micro SD adaptor supplied free with the card. In this instance, you must have a MicroSD adaptor slot on your PC or have a USB Micro SD adaptor attached. Alternatively, you can purchase a WIFI / FTP app from the Google Play store to transfer files via WIFI. 6) Using this MicroSD card for use on ANY compatible device. Although this MicroSD card (also known as a TF card) is called "Ultra Android" You can use this SD card in Cameras and Mini computers such as the Raspberry Pi and Arduino as well as ANY ANDROID based PHONE or TABLET that has a Micro SD expansion slot. I suspect SanDisk added "Android" in the heading because the most popular usage is for Android Phones and Tablets. Just check on the side of your phone or tablet for a MicroSD Slot. If you're unsure, double check on your product manufacturers website.

The product works as expected and came in minimal packaging (as advertised) this may be worrisome to some people however rest assured the SD card works just fine. I am using it with my LG G3 mobile phone and it works just fine after formatting it to the correct standard. Would recommend to anyone looking for an affordable storage expansion for their portable devices

The SanDisk Ultra 64 GB microSDXC memory card is a solid and reliable storage option for everyday use. It offers good read speeds, making it well suited for expanding storage on phones, tablets, cameras, or other devices. File transfers are quick, and it performs smoothly for apps, photos, and Full HD video recording. The included SD adapter is a useful addition and makes it easy to use the card with laptops or cameras that require a full-size SD card. Overall, it feels dependable and is exactly what you’d expect from a trusted brand like SanDisk. Pros: • Reliable and consistent performance • Good speeds for everyday use • Suitable for photos, videos, and apps • SD adapter included • Trusted brand quality Cons: • Not designed for 4K video or very high-performance needs

Very good

With all the questionable MicroSD cards being produced today, it's important to gather all the information you can. The MicroSD I bought was the SanDisk Ultra MicroSDXC UHS-I with adapter. It states that the speed can reach 80MB/S, but with a caveeat- the write speed is no where near this. Check the disclaimers: [16-128 GB] Up to 80 MB/s read speed; write speed lower. I just ran H2testw 1.4 (latest) to verify my MicroSD, as you should do when you receive any storage cards. The writing speed using a USB 3.0 MicroSD Adapter from KiWiBiRD reached a maximum of 28.5 MByte/s- I was hoping for better. The reading speed using the same adapter reached a maximum of 85.6 MByte/s (Great!) The test finished without errors and filled the full capacity of the card, so I can verify that it at least isn't a re-labelled fake. I contacted SanDisk about determining if my MicroSD card was a fake, and I provided them with some information and a number of photos. An excerpt of their response: "Based on the information that you have provided, it seems that your card is an authentic SanDisk product." Perfect! Totally recommended. Bought a second for a relative.

I always use SanDisk Memory now as I have found them to be the best consistantly compared to others makes and I think they are one of only three actual manufacturers (I will stand corrected if this is wrong), rather than "rebranders". Regarding speed I have one of the 'older' 128GB 48MB/s cards and this is defintely a welcome improvement - not a massive inprovement, but definitely noticeable on both read/write operations. I tranfer a vast amount of big/small files on and off these and the faster speed is definitely a time saver and worth the money. I use the in my smartphone/tablets and have just bought 3 of these newer one from Amazon, now that the price is MUCH more affordable. I really can't see them getting any cheaper or they will be giving them away, I paid £39 for a 64GB one in August 2013 ! (Now there's a thought). Anyway, overall I think they do their job well and I now look forward to a 256GB version, along with a Smartphone/Tablet that will take them, and I am sure that will happen too !

OK so a review update. 1 month in and the SanDisk installed in the Samsung Galaxy S7 now gives a few random errors on reading large files. Seems ok for the phone, but after making a video which plays on the phone, the file fails to transfer (read) to the PC. I haven't done any further tests. I replaced this SD card for the slightly more expensive Samsung Evo plus. The SanDisk in the Surface pro is fine so far. Superb quality and a superb price here on Amazon Clearly none of the SD cards in this price range will write anywhere near 80mbs, but this card has a great capacity and is fast enough for expanding a phone or a tablet. I bought two - one for a Samsung Galaxy S7 Edge and the second for a Microsoft Surface Pro 4 - both work great!