A comparison and speed tests between all the most popular memory cards and how they perform in various cameras and devices.
Table Of Contents
- SD Memory Card Speed Chart
- Best Memory Cards By Camera
- Memory Card Types And Performance
- Memory Card Trouble Shooting
SD Memory Card Speed Chart
This chart shows how each memory card performs with Windows 10 with Crystal Disk and a UHS-II Lexar memory card reader.
You can sort by speed or class to find the fastest SD memory card or the slowest.
Note that this test shows results based on desktop hardware and memory card readers, however, most devices can’t match the hardware found in a PC and will often have wildly different results from this chart below.
I test most memory cards in most cameras and devices so hopefully, you can find your device in this article. If not, you can fall back to this chart.
|Memory Card||Speed Class||USB Read MB/s||USB Write MB/s||Order|
|Sandisk Extreme Pro 170MB/s U3||UHS-I||99.2||88.3||Amazon|
|Sandisk Extreme Plus U3||UHS-I||99.3||88.2||Amazon|
|Sandisk Extreme U3||UHS-I||99.3||56.8||Amazon|
|Sandisk Ultra U1||UHS-I||99.5||34.3||--|
|Kingston CanvasReact A1 U3||UHS-I||99.6||82.5||Amazon|
|Kingston CanvasGo! U3||UHS-I||99.6||74.0||Amazon|
|Lexar 633x U1||UHS-I||95.0||54.6||--|
|Sony Professional U3||UHS-I||98.5||60.2||Amazon|
|Sony U3 94MB/s||UHS-I||96.7||57.5||Amazon|
|Sony U3 95MB/s||UHS-I||96.6||85.4||Amazon|
|Transcend U3 U3||UHS-I||96.7||87.8||Amazon|
|PNY Elite Performance U3||UHS-I||96.7||66.9||Amazon|
|Delkin Advantage U3||UHS-I||99.6||78.8||Amazon|
|Toshiba Exceria Pro U3||UHS-I||97.8||74.7||Amazon|
|Toshiba Exceria U3||UHS-I||97.2||29.9||Amazon|
|Verbatim Pro+ U3||UHS-I||98.5||83.7||Amazon|
|Verbatim Pro U3||UHS-I||96.6||68.0||Amazon|
|Amplim 667x A1 V30||UHS-I||99.6||52.2||Amazon|
|Sandisk Extreme Pro 300MB/s||UHS-II||258.5||190.5||Amazon|
|Toshiba Exceria Pro||UHS-II||263.6||223.8||Amazon|
|Sony G Tough||UHS-II||256.8||201.0||Amazon|
|Fujifilm Elite II||UHS-II||259.3||168.4||Amazon|
|Hoodman Steel 2000x||UHS-II||268.7||183.9||Amazon|
|Hoodman Steel 1500x||UHS-II||258.1||169.2||BHphoto|
|Amplim 1900x V60||UHS-II||249.8||104.5||Amazon|
|Angel Bird V90||UHS-II||256.6||211.1||Amazon|
|Angel Bird V60||UHS-II||166.9||80.24||Amazon|
|FreeTail Evoke Pro V60||UHS-II||238.5||102.8||Amazon|
Best Memory Cards By Camera
A list of memory card speed tests on each camera. Over the last several years I’ve been testing the most popular memory cards in each camera to find which memory cards work the best in each camera. Use this guide to find the best memory cards for your camera.
I’ve broken the list down between camera brands.
Canon Memory Card Tests
I’ve moved all the Canon tests to their own page. There are always new memory cards and it becomes difficult to test old cameras with new cards. Having a dedicated page allows me to give some general recommendations of you’re looking for new cards in an older Canon camera.
Sony Memory Card Tests
Sony cameras until recently have been plagued by a bus speed bottleneck. Most of their cameras are only capable of write to memory cards at a speed of about 30MB/s. New cameras like the Sony A9II and the A7rIV have improved memory card performance with speeds that can even match CFexpress cards in the Nikon Z cameras.
When shooting video in Sony cameras you will not be able to use Samsung memory cards, they are not compatible.
Fujifilm Memory Card Tests
Fujifilm cameras always perform great with memory card speed tests. Besides Canon, they are some of the fastest cameras out there when it comes to clearing a buffer to a fast SD memory card.
Nikon Memory Card Tests
Nikon is somewhere between Canon and Fujifilm. Some of their cameras have the 30MB/s bottleneck some don’t. This is from using older, slower UDMA tech.
Many of the pro models of Nikon cameras also use XQD memory cards which have been tested in appropriate cameras.
|Full Frame – FX||APS-C – DX||Small Sensor|
|Nikon Z6II / Z7II||Nikon Z50||Nikon P1000|
|Nikon Z5||Nikon Z30|
|Nikon Z6 / Z7||Nikon D500|
|Nikon D850||Nikon D7500|
|Nikon D810||Nikon D7200|
Panasonic Memory Card Tests
Like many of the Sony cameras, Panasonic typically has poor memory card performance when dealing with their micro four thirds system. They have a similar 35MB/s bottleneck bus speed as Sony. The GH5 gets around this by using UHS-II memory cards that have dual lanes, so you get around 36Mb/s + 36Mb/s with a combined speed of around 70MB/s. However, the new full-frame system has incredible UHS-II and UHS-I memory card performance.
|Full Frame||M43||Fixed Lens|
|Panasonic S1H||Panasonic G9||Panasonic FZ2500|
|Panasonic GH5s||Panasonic LX100 II|
|Panasonic GH5||Panasonic LX100|
Olympus Card Tests
Some of Olympus’s older cameras have bus speed bottlenecks which restricted memory card write speeds. The new Pen-F, however, is much quicker. I still have a few more Olympus cameras to test out.
|Olympus E-M1 Mark III|
|Olympus E-M1 Mark II|
|Olympus E-M5 Mark II|
Pentax Card Tests
I haven’t tested too many Pentax cameras but the Pentax K-1 performs very similarly to the Sony A7r. It has a bus speed bottleneck so memory card write speeds are limited to about 30MB/s.
Ricoh SD Cards
|Ricoh GR III|
Sigma Memory Card Tests
Sigma has a few cameras geared for a few different things, but their new L mount fp camera is loaded with some interesting specs that will make having the right memory card crucial.
Action Cameras Memory Card Tests
The GoPro Hero 5 was notorious for having issues with memory cards. A lot of great memory cards like the Sandisk Extreme Pro just wouldn’t work properly. However, the Hero 6 and Hero 7 uses all new hardware and most of the memory card issues seen in older cameras have disappeared.
DJI Osmo Action and Osmo Pocket have had very good memory card performance even with the slightly her bitrate than what GoPro offers.
|GoPro Hero 8|
|GoPro Hero7 Memory Cards||Osmo Pocket|
|GoPro Hero6 Memory Cards||Osmo Action|
|GoPro Hero5 & Session Memory Cards|
Drones Memory Card Tests
Every memory card I’ve tested in the DJI spark worked great. The camera on the Spark doesn’t really have great performance and it doesn’t require very fast memory card write speeds.
|DJI Mavic 2 Pro / Zoom|
SmartPhones Memory Card Tests
The Samsung Galaxy S8 and S8+ are one of the few popular smartphones to allow memory cards. I’ve tested most of the Micro SD memory cards in this smartphone to see which perform the best. The results are very surprising as performance between cards varies wildly.
|Samsung Galaxy S8 & S8+ SD Cards|
|Samsung Galaxy S10 & S10+ SD Cards|
|Samsung Galaxy S20 & S20+, S20 Ultra SD Cards|
Memory Card Types And Performance
What Do All The Numbers And Letters On Memory Cards Mean?
SDHC – SDHC indicates that a card is going to use the 32-bit Fat32 file structure. This can have some performance limitations on cards. Some of the new Speed Classes like V30, V60 aren’t available on these fat32 cards. Also, you’ll see a file size limit of around 4GB.
SDXC – SDXC indicates that the card is going to be 64-bit using the exFat file structure. This means you get all the of what technology memory cards have to offer. The V30, v60 speed classes and larger file sizes.
Class 10 – This is an older designation that they still put on memory cards. There used to be other classes written on memory cards, typically it would be a number inside a circle. Now every card is pretty much Class 10 and new Speed Classes have come around like U1 / U3 and V30 / V60 etc. So it’s all getting a little cluttered. Class 10 will give you a minimum guaranteed write speed of 10MB/s.
U1 / U3 – These are speed classes like Class 10 that indicate the minimum write speed a card is capable of. U1 is 10MB/s and U3 is 30MB/s. Typically if you’re shooting high bitrate video, you’ll want the U3 cards. Some cameras like Sony’s won’t even let you use their advanced video codecs without a U3 memory card.
V30 / V60 / V90 – This is the latest speed class. Just like Class 10 and U1 / U3, this speed class has to do with a guaranteed minimum write speeds. V30 = 30MB/s, V60 = 60MB/s and so forth.
UHS-I / UHS-II – UHS-I and UHS-II memory cards are built completely different. UHS-II memory cards have a second set of pins that basically give the memory cards dual lanes to read and write data to and from. This makes these memory cards potentially twice as fasted when used in UHS-II devices.
Memory Card Trouble Shooting
Memory Card Not Working
There are several reasons a memory card may not work and I’ll list a few that I’ve seen or have personally dealt with.
1. Bad Memory Card – Every so often you can get a bad memory card, either they are DOA or they are just defective and die after a short time. Most memory card brands offer a 10-year to a lifetime warranty. Sony cards usually only offer a 1-year warranty. So you can always send your card back and try a new one.
2. Brand Incompatibility – Some camera brands don’t like some memory cards. For example, Sony cards do not like Samsung memory cards and they will not work for video. Canon says their cameras don’t like Sony cards, although I’ve yet to have problems with Sony cards in Canon cameras, those are a few examples. If you’re having issues with a certain card in a camera, try a different brand. Sandisk cards work perfectly in most cameras.
3. Memory Card Is Slow – Again you could have a defective memory card, or, you could have a counterfeit memory card. If you bought your memory card off of eBay and you didn’t buy it from the manufacturer or trusted camera store, chances are, you could have a counterfeit memory card. Always make sure you buy your memory cards from a trusted source. BHphoto, Amazon, Adorama etc.