"Following" other users' reviews, I purchased this specific card for use in a Samsung Galaxy S9 mobile phone.
The read and write speeds are quite close to the manufacturer's specifications.
Personally, I observed read speeds around 75Mb/s and write speeds close to 65Mb/s.
I must clarify that the usage was done through the included adaptor on an HP laptop's SD port, but with "countless" files, small and large, in folders and subfolders, etc., which in itself significantly reduces the speeds.
It is definitely worth its money.

Fastest in recording and reading. High-quality and trouble-free with a relatively good price. What else can someone ask for? Get it with closed eyes

I was looking for an affordable, high-quality, and relatively fast 128gb memory card for my mobile phone. There were definitely cheaper options available, but after searching, I ended up here. I think it's worth the money and it's relatively fast, as I mentioned before.

The difference with a 64GB SANDISK that I had, which was 4 years old, was chaotic. Very fast memory card for mobile phones, it doesn't freeze at all (so far) and I consider it very value for money and very reliable. I wouldn't go for a more expensive one if I was looking for a solution for mobile only. It's just what I need.

I have this sd here for a year now and I absolutely have no issue for the 24 euros I spent, I have absolutely no complaint, I would buy it again with my eyes closed.

Very fast indeed, as expected, you get one of the fastest and highest quality sd cards with the Samsung Evo, I highly recommend it

Exactly what it says.
The speeds are accurate and it is a good value for the product

Quite a good product for its price. The only issue it had was the annoying write protection (of the adapter) that didn't allow file transfer-editing from and to the card.

I use it on Samsung Galaxy 32GB.
The reason I bought a 128GB card is because I have a lot of photos and videos on my phone and I don't want to transfer them to another device, I want to have them on my phone.
Currently, its capacity is exactly 100GB, but at some point it was completely full!
Of course, many times it freezes or slows down when viewing files, but this could also be due to my phone's long-term use...

As for performance, that's where it shines! It is quite fast in file transfer.

I recommend it!

On the Huawei Mate 20 lite that I use, quite often it loses the SIM card. It doesn't read it and I have to restart it. I don't know if it's the card's fault or the phone's, but with my previous card I never had any problems.

I unfortunately had my disappointment, as I lost a lot of photos. It played me. I formatted it on my phone, nothing. On a computer, it didn't even recognize it. I sent it for replacement and I hope they send me another one. But the damage has been done.

40gb recording in just 1 hour, that's all I have to say and from the hard HDD that I have on my PC. Bravo Samsung, you're finally doing something! I recommend it without hesitation, guys... great value for money!

Excellent file transfer speed from the internal memory of the mobile to the card. First time I see 80-100 mb in this task.

I confess to say that Samsung is generally one of my favorite companies.. always first in my preferences!
It disappointed me with this card of course.. but I believe that it is due to both times to a possible "defective" batch since the first one broke in my 6th month and the second one in the 2nd month!
The 1/5 is firstly because I lost photos and videos and secondly because the second one broke in the 2nd week

I bought it for the go pro hero 7, in which I currently shoot videos up to 1080p. Very reliable, I haven't had any problems or complaints. I don't know if it's very fast in recording because the go pro is very slow in everything, but in the videos I watched at home, I didn't notice any issues!

I got it a month ago... I had read that it is very fast and so on, so I decided to get it. I have it on an LG V20. The mobile phone was very slow when taking photos and saving them to the card, and it often froze... it has nothing to do with the internal memory of the phone... I don't know if something went wrong, I just expected speed. So I save everything to the storage of the phone and I only use the card for songs and some photos. The price is good and I bought it for reliability... It is very important to have everything on the card so that if the phone ever doesn't turn on, you don't have a big problem.

Unfortunately, in my trimester, my computer crashed and I lost all the photos that I had stored there. I can't understand the reason why. Thankfully, with a recovery program - specifically Recuva - I managed to recover most of the files, but the hard drive is now useless.

Very good for its price (I bought it for 26.99).
Works perfectly on the camera I use (replaced the same 64GB card) without any glitches.

Very good card fast for my galaxy s9 plus and for my galaxy s7 I have taken countless 4K videos and editing on the phone and it never freezes.

I found a good deal on the card for 30€ and I bought it! If it goes below 25, get it.. otherwise go for sandisk.

Measurements in Crystal DiskMark with USB 3.0 Card Reader:

Test count: 2
Test size: 50 MiB

Sequential Read (Q= 32,T= 1) : 92.164 MB/s
Sequential Write (Q= 32,T= 1) : 84.636 MB/s
Random Read 4KiB (Q= 8,T= 8) : 11.663 MB/s [ 2847.4 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 4.291 MB/s [ 1047.6 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 11.660 MB/s [ 2846.7 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 4.431 MB/s [ 1081.8 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 11.090 MB/s [ 2707.5 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 4.267 MB/s [ 1041.7 IOPS]

I placed it in the s7 edge and it works perfectly. I chose this card because my previous one, which I had for several years, was also Samsung. After about 2 years of use, I have no problems.

I had the predecessors of the 32 & 64 Gb, very "durable", they had completed TB cycles and never betrayed me. For the money, I can say it's the best, the same goes for reliability. Very positive for me that the nominal space is real, for example, it says 64 is 64, unlike other brands that give you -10% = 58Gb.
Now, with the speeds, 60-70W / 70-80R on note8. Sometimes it freezes a bit in 4k recording, burst shooting cannot be done. But it's not v30 and for the money I got it (36e from abroad) I can't have any complaints

Simply honest compared to the manufacturer's specifications. It does not lock like others after a while.