Samsung MicroSD EVO+ 256GB + adap Cl10, MB-MC256DA_EU

Just what I needed, reminder unencrypt your SD card before you send the old phone back!! hahahaha I forgot too! So, I had to buy this wonderful new 256gb SD card, lot's of storage, you basically don't run out.

I've now had three of these fail within the space of a few days all in the same way. Insert into phone - okay, load data - okay, go to use....card dies and becomes unusable. I've had Samsung cards before and they have all performed well and been pretty reliable. All of these recent batch of cards were purchased from Amazon EU Sarl and not third party sellers, so I can only assume that a faulty or fake batch of these cards is doing the rounds. In the end I ended up buying alternatives in store and they have worked fine.

I need to say from the get-go that I'm not using this card in a phone but inserted in a Microsoft Surface Pro and so far I cannot fault it. I loaded it up with about 78GB of movie files (averaging about 3GB per movie - largest file 5.6GB) and 70GB of music (smaller files averaging about 6MB) and it accepted all that data flawlessly. Testing with Crystal DiskMark I get 80MB/s sequential read speed and 74GB/s sequential write speed (using 1GB data). It basically doubles the data capacity of my Surface. Now, I realise the performance is nowhere near that of the internal SSD but if you're using the card as a mostly read device, like I am then the performance is more than adequate. I haven't tried watching 4K movies from it, but standard 1080P with 5 channel DTS sound track works perfectly.

i was so excited to get this. i soon realised i was having problems streaming 4k video. as others have said i am getting speeds of around 50-60 at best and thats after i formated card. sent it back for a refund. spent ages reaserching for my s8 and thought i got a good deal but not as advertised and would be gutted to have to keep. thank you amazon. ur giving power back to the consumers

I have used it to expand the internal SSD drive of my MacBook Pro 15 (formerly used for my MacBook Air 13.3). It's very nice, so far no issues. Just remember to format it according to Mac standards (journaled) before using it. At times might be detected (few times has happened with my Air but not so far with my new Pro 15). easily overcome by restarting your system.

Even though I am a tech guy that loves gadgets and stuff I don't need no speed tests to help me sleep at night... inserted it to my galaxy s8 without any troubles and it works... what else do you need?PS: The package it came with was pain in the ass to open without scissors so be prepared :)