Transcend 16GB microSDHC 300S Class 10 Memory Card with up to 95/45 MB/s (for Smartphones, Digital Camers and Nintendo Switch Consoles) without SD Adapter TS16GUSD300S
£5.99





Price: £5.99
(as of Jun 23, 2025 18:54:41 UTC – Details)
From the manufacturer
Features

A good fit for mobile app storage
It’s common for users to install and run mobile apps from microSD cards in order to free device memory. Random read/write performance is thus crucial. Transcend’s microSDXC/SDHC 300S memory cards are a great fit for storing mobile apps.

Introducing Application Performance Class
Transcend’s microSDXC/SDHC 300S memory cards meet the new A1 standards, delivering minimum random read of 1,500 IOPS and random write of 500 IOPS, and sustained sequential speeds of at least 10MB/s. Note: A1 compliance applies only to 128GB-512GB capacity cards.

Show the transfer capabilities
Transcend’s microSDXC/SDHC 300S memory cards meet both the UHS Speed Class 3 (U3) and the UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recordings, with read/write speeds of up to 95MB/s and 40MB/s respectively. Note: U3 and V30 compliance applies only to 128GB-512GB capacity cards.

Store as many as you wish
In addition to excellent random read/write performance, Transcend’s microSDXC/SDHC 300S memory cards come in up to 512GB storage capacity, allowing you to keep more digital files and apps at hand!

Built for extremes
To deliver the best performance and stability, Transcend’s microSD memory cards are tested to withstand extreme conditions. They are temperature resistant, waterproof, shock proof, X-ray proof, and static proof.

RecoveRx software
Transcend offers RecoveRx software, a data recovery utility that allows you to search deep within a storage device for traces of erased files including digital photos, documents, music and videos.
Speed Class

UHS Bus Interface
UHS-I provides faster bus speed using just one row of pins, while UHS-II uses two lanes for even faster data transfer via two rows of pins. The symbol “I” means UHS-I, and “II” means UHS-II. Please make sure your device supports the same standard to benefit from the increased speeds.

UHS Speed Class
UHS Speed Class includes UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3). UHS Speed Class 1 supports a minimum 10MB/s write speed, whereas UHS Speed Class 3 supports at least 30MB/s write speed.

Video Speed Class
Video Speed Class is defined to answer a demand for high resolution and high quality 4K8K video recording. V60 (60 MB/s) and V90 (90 MB/s) can support 8K resolution, while V6, V10 and V30 capture high-definition and 4K resolution and ensures a minimum sequential write speeds of 6 MB/s, 10 MB/s and 30 MB/s respectively.

Application Performance Class
Application Performance Class assures minimum random and sequential performance speeds to run and store smartphone apps. Application Performance Class 1 (A1) delivers minimum random read of 1,500 IOPS and random write of 500 IOPS. Application Performance Class 2 (A2) delivers minimum random read of 4,000 IOPS and random write of 2,000 IOPS.
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Customer Reviews
4.5 out of 5 stars 2,601
4.4 out of 5 stars 117
4.6 out of 5 stars 9,227
4.3 out of 5 stars 794
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Price
£47.98£47.98
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£12.46£12.46 £16.99£16.99
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Capacity
8GB ~ 128GB 64GB ~ 256GB 4GB ~ 512GB 64GB ~ 128GB 16GB ~ 64GB
Flash Type
MLC NAND flash 3D NAND flash 3D NAND flash 3D NAND flash MLC NAND flash
Speed Class
UHS-I U3 / C10 / V30 UHS-I U3 / C10 / V30 / A2 UHS-I U3 / C10 / V30 / A1 UHS-I U1 / C10 UHS-I U3 / C10
Maximum Performance
R 95MB/s, W 80MB/s R 100MB/s, W 85MB/s R 95MB/s, W 40MB/s R 95MB/s, W 45MB/s R 90MB/s, W 45MB/s
Insertion/Removal Cycles
10,000 10,000 10,000 10,000 10,000
Reliable Performance: This high-speed 300S memory card memory card offers high-speed data transfer rates, ensuring smooth performance for recording 4K videos and high-resolution photos, tailor-made for photographers and videographers
Durable Design: Built to withstand harsh conditions, this high-speed 300S memory card is temperature, waterproof, shockproof, and X-ray proof, making it optimal for outdoor adventures and extreme environments
High Capacity Options: Available in various storage capacities, this high-speed 300S memory card meets different storage needs, from casual users needing extra space to professionals requiring high-capacity cards for extensive media files
Versatile Compatibility: This high-speed 300S memory card is compatible with a wide range of devices including cameras, smartphones, tablets, and laptops, ensuring easy access to your data across various platforms
Easy File Management: The card supports quick file transfer and management, making it effortless to organize and store your files The optimal choice for photographers and content creators prioritizing workflow efficiency
Data Protection Features: This high-speed 300S memory card comes with built-in error correction and wear leveling technologies to safeguard your data, ensuring its integrity and longevity
Customers say
Customers find the memory card works perfectly in Nintendo Switch devices and offers good value for its storage capacity, particularly for expanding 128GB Surface Go devices. Customers praise its fast read and write speeds, reliable performance, and good fit for various devices, with one customer noting it’s ideal for Roku streaming boxes. The card’s quality receives mixed feedback, with some customers finding it genuine while others report quality control issues.
13 reviews for Transcend 16GB microSDHC 300S Class 10 Memory Card with up to 95/45 MB/s (for Smartphones, Digital Camers and Nintendo Switch Consoles) without SD Adapter TS16GUSD300S
Add a review
£5.99
Alex P. –
Works, but you do get what you paid for…
This is a superficial breakdown of 30 minutes spent with the card, so take it with a grain of salt.Using it with an adapter into a laptop equipped with a decent SSD, you can expect write speeds that constantly dip as low as 9-10 MB/s and go upwards to 28 MB/s. Read speeds usually sit in the high 20s. Haven’t tested it straight into a device, so speeds might improve, as shown by another customer with pictures (70+ mb).As for the capacity, as I see this argument popping up over and over again, please educate yourself why the advertised capacity by the manufacturer is different than the one showed by your computer. A simple google search will give you multiple articles regarding this.For all intents and purposes storage is calculated as you would weight, distance etc, by adding zeros to the end.so 1 Gigabyte (GB) = 1,000 megabytes (MB) etc.However due to how computers work, they will not show these values, but instead:1 Gigabyte (GB) = 1,024 megabytes etcThe bigger the drive is, the more capacity is “lost” in the listing of your device.128 gb = 1,099,511,627,776 bit1,099,511,627,776 bit = 137,438,953,472 byte137,438,953,472 byte = 134,217,728 kilobyte134,217,728 kilobyte = 131,072 megabyte131,072 megabyte = 128 gigabyteI made a quick calculation (which could be slightly incorrect, failed math):The amount you “lose” is as fallows:Gigabyte difference = 73,741,824 bytesSince per GB your are “losing” 73,741,824 bytes, then 73,741,824 bytes x 128 GB = 9,438,953,472 bytes, which converted to GB equals: 8.79071 GB (as shown in the picture).Windows machine shows 117 but if we add the “missing” 8.7gb = 125.7, which is closer to the advertised capacity.Also this might be true for write/read speeds as well, and the actual product does not advertise 95MB/s, rather “up to” which is correct.Does the job, but I would use it for complex write and read situations. Only really useful for mobiles and other hand held devices.
PAUL BYRNE –
Good value high data storage SD card
Does exactly as described great value and storage.
Marco –
Brilliant value card
Some initial teething trouble, which was just a case of finding an SD adaptor that housed it snuggly (seemed fussier than other cards). For the low price, the card works quickly enough and performs well even with a non-lightweight Linux distro running on it. Of course as itâs not a high endurance card, it canât be expected to last very long under such heavy duress. Time will tell!Overall for normal storage use, itâs a great buy, and will probably buy again at some point.
Andrei –
OK performance with my Surface Pro 6, and cheap
This Transcend card gives satisfactory performance, I think.I use it in the microSD slot of my Surface Pro 6 to provide bulk storage.Please see the attached benchmark photos.In my testing, it gave slower write speeds when formatted as NTFS (vs exFAT), but I think it is still OK.Random access R/W speeds are not too bad, better than a HDD of a few years ago.For GBP 14.95, 128 GB, it’s OK.Only four stars because it does not achieve the advertised 95 MB/s read speed.
James Donohoe –
Perfect SD card for IP Camera
Bought this to setup all day recording in one of my IP camera after my other card failed. Super happy, nice and cheap and works without issue.
JAITMAN –
Still Going strong
Used for data transfer. Purchased a few years ago. Not hyper fast, but speed is as specified and still going strong.
A Mahmud –
Great (maybe overkill) for a 2DS
I recently bought this to upgrade my cousin’s 2DS to a 64GB card so they can play around with modding and homebrew. While the 2DS/3DS have class 4 slots, this is overkill in that regard; it is brilliant when transferring files over from the PC to the card. Works well, what more can I say. I also have the 128GB version in my Nintendo Switch and that has been going strong for many years.
Muskrat –
Seems good value edit but…
Its a storage card which stores at a reasonable price. 20 years ago it would be science fiction!Edit changed this to 3 stars as it would not work in the cheap dashcam I bought but a SanDisk one did. Worked fine in my mobile though
MACIEK –
polecam
Abdulmohsen Alshedayed –
ð
Mr L. –
Très rapide, utilisé premièrement pour raspberry pi 5, les vitesses étaient en effet plus rapide que d’autres marques. Utilisé en stockage depuis quelques semaines dans un lecteur microsd, il fait parfaitement l’affaire pour visionner des vidéos 4K sur une TV
Kevin Phillips –
Okay
J.L.Fernandez –
IntroducciónEn el vasto mercado de tarjetas de memoria, encontrar una opción que combine velocidad, fiabilidad y precio competitivo puede ser un desafÃo. La tarjeta Transcend USD300S MicroSD de 128GB ha capturado la atención de muchos usuarios por sus especificaciones prometedoras. Después de haberla probado extensamente, quiero compartir mi experiencia y evaluación detallada.Especificaciones TécnicasLa tarjeta Transcend USD300S viene con una serie de especificaciones que la hacen destacar en el mercado:Capacidad: 128GBClase: 10Clasificación de velocidad de video (V30): Esto asegura una velocidad mÃnima de escritura sostenida de 30 MB/s, ideal para grabación de video 4K.Clasificación de aplicaciones (A1): Optimizada para aplicaciones móviles con una velocidad mÃnima de lectura aleatoria de 1500 IOPS y escritura aleatoria de 500 IOPS.Velocidad de lectura: Hasta 100 MB/sCompatibilidad: Con smartphones, tabletas, cámaras de acción, drones y más.Pruebas de RendimientoPara evaluar el rendimiento real de la Transcend USD300S, realicé una serie de pruebas utilizando tanto dispositivos móviles como lectores de tarjetas de alta velocidad conectados a una computadora.Pruebas en Dispositivos MóvilesPrimero, inserté la tarjeta en un smartphone Samsung Galaxy S21 para probar su rendimiento en un entorno de uso diario. Los resultados fueron impresionantes:Instalación y Ejecución de Apps: Gracias a la clasificación A1, las aplicaciones instaladas en la tarjeta se cargaron rápidamente. Juegos y aplicaciones pesadas, como Asphalt 9 y Adobe Lightroom, funcionaron sin problemas notables.Almacenamiento de Medios: Transferà una colección de fotos y videos 4K a la tarjeta. La transferencia fue rápida y fluida, sin interrupciones ni retrasos. La reproducción de videos 4K también fue impecable, sin ningún tipo de buffering.Pruebas en ComputadoraUtilicé un lector de tarjetas USB 3.0 para medir las velocidades de lectura y escritura utilizando software de benchmarking como CrystalDiskMark.Velocidad de Lectura: Alcancé consistentemente velocidades cercanas a los 98 MB/s, muy cerca del máximo teórico de 100 MB/s anunciado por Transcend.Velocidad de Escritura: Las velocidades de escritura variaron entre 30-35 MB/s, superando ligeramente la clasificación mÃnima V30.Durabilidad y FiabilidadLa tarjeta Transcend USD300S está diseñada para ser resistente y duradera, lo cual es esencial para usuarios que necesitan una tarjeta confiable en condiciones adversas. La tarjeta es:Resistente al agua: Probé esto accidentalmente cuando la tarjeta se mojó durante una sesión de fotos al aire libre. No hubo pérdida de datos ni daños.A prueba de golpes y vibraciones: Utilicé la tarjeta en un dron DJI Mavic Air 2, donde las vibraciones y los movimientos bruscos son comunes. La tarjeta funcionó perfectamente.Protección contra rayos X y temperaturas extremas: Aunque no pude probar estas caracterÃsticas personalmente, es reconfortante saber que la tarjeta está protegida contra rayos X en aeropuertos y puede operar en un rango de temperaturas extremas, desde -25°C hasta 85°C.Experiencia GeneralLa experiencia general con la Transcend USD300S ha sido muy positiva. Desde su rendimiento consistente hasta su durabilidad, esta tarjeta ofrece una excelente relación calidad-precio. Las velocidades de lectura y escritura cumplen con las especificaciones anunciadas, y la tarjeta maneja tareas intensivas, como la grabación de video 4K y el almacenamiento de grandes bibliotecas de fotos y aplicaciones, sin ningún problema.ConclusiónEn resumen, la Transcend USD300S MicroSD de 128GB es una excelente elección para cualquier usuario que necesite una tarjeta de memoria rápida y confiable. Sus altas velocidades de lectura y escritura, combinadas con su resistencia a condiciones adversas, la convierten en una opción ideal para una variedad de dispositivos y usos. Ya sea para expandir el almacenamiento de un smartphone, grabar video en 4K con una cámara de acción, o utilizarla en un dron, esta tarjeta ofrece un rendimiento robusto y consistente.Definitivamente recomendarÃa la Transcend USD300S a cualquiera que busque una tarjeta MicroSD versátil y duradera. Su precio competitivo y caracterÃsticas avanzadas la hacen destacar en un mercado saturado de opciones. ¡Una compra de la que no te arrepentirás!