To keep true to the Galaxy, Samsung kept alive the ability to expand the storage with a micro-SD memory card slot.
I’ve compiled a massive list of benchmarks with a few recommendations from all the most popular SD cards tested with the Galaxy phones. See the results to find the best memory cards for your needs.
Best Memory Cards Samsung Galaxy S20, S20+, S20 Ultra
Like the previous phones like the S10 and S10+ Samsung has kept the micro SD memory card slot in the smartphone so that you can add your own micro SD memory card to expand the storage with a capacity up to 1TB.
There are a few things you need to know before buying memory cards.
There are A1 and A2 micro SD memory cards specifically designed to run applications. If you want to expand the storage of your Galaxy and run apps off the card, you should buy the A2 memory cards. If you just plan on using your phone for storage for photos and videos, then it doesn’t matter.
Quick Update: Here are a few flash sales. 03/16/20
Sandisk 128GB-1TB sizes A2 Micro SD Card – BHphoto
Massive discounts there.
Top 5 Recommended SD Cards Galaxy S20, S20+, S20 Ultra
I’ll list a few of the fastest performing memory cards that I tested in the S10+ with both A2 specs and without. The Galaxy phones do not yet use UHS-II technology so there is no reason to buy the more expensive UHS-II cards.
The Read and Write speeds listed here come from the Galaxy S10+. If I get a chance I’ll retest in one of the S20 phones.
I have listed here 128GB cards, but you can buy cards up to a 1TB capacity. Some people even like those 400GB Sandisk cards. The bigger cards should match a similar performance as the 128GB cards I’ve tested here, so just be sure to match the card.
| Card Name | Write Speed | Read Speed | Check Price |
| Sandisk Extreme Pro A2 128GB | 54MB/s | 79MB/s | Amazon |
| Sandisk Extreme A2 128GB | 55MB/s | 78MB/s | Amazon |
| Sandisk Extreme Plus | 75MB/s | 80MB/s | Amazon |
| Samsung EVO Plus | 42MB/s | 83MB/s | Amazon |
| PNY PRO Elite | 70MB/s | 74MB/s | Amazon |
Memory Card Benchmarks
I benchmarked each memory card in the Galaxy S10 to get the read and write speeds using Disk Speed Test for Android. Here are the results.
| Card Name | Class | Write Speeds | Read Speeds | Order |
|---|---|---|---|---|
| Sandisk Extreme Pro U3 128GB | UHS-II | 73MB/s | 83MB/s | Amazon |
| Sandisk High Endurance V30 128GB | UHS-I | 41MB/s | 84MB/s | |
| Sandisk Extreme Pro U3 64GB | UHS-I | 75MB/s | 78MB/s | Amazon |
| Sandisk Extreme Pro U3 A2 128GB | UHS-I | 54MB/s | 79MB/s | Amazon |
| Sandisk Extreme Plus U3 64GB | UHS-I | 75MB/s | 80MB/s | Amazon |
| Sandisk Extreme U3 A2 128GB | UHS-I | 55MB/s | 78MB/s | Amazon |
| Sandisk Extreme U3 64GB | UHS-I | 55MB/s | 81MB/s | Amazon |
| Sandisk Ultra U1 A1 128 GB | UHS-I | 32MB/s | 72MB/s | Amazon |
| Sandisk Ultra U3 64GB | UHS-I | 30MB/s | 79MB/s | Amazon |
| Sandisk Nintendo 128GB | UHS-I | 49MB/s | 49MB/s | Amazon |
| Samsung Pro+ U3 64GB | UHS-I | 73MB/s | 75MB/s | -- |
| Samsung Pro U3 64GB | UHS-I | 67MB/s | 74MB/s | -- |
| Samsung Pro Select U3 64GB | UHS-I | 72MB/s | 75MB/s | -- |
| Samsung EVO Plus U3 64GB | UHS-I | 42MB/s | 83MB/s | Amazon |
| Samsung EVO+ U1 64GB | UHS-I | 20MB/s | 74MB/s | Amazon |
| Samsung EVO Select U3 64GB | UHS-I | 40MB/s | 69MB/s | Amazon |
| Samsung EVO Select U1 64GB | UHS-I | 23MB/s | 77MB/s | -- |
| Samsung EVO U3 64GB | UHS-I | 40MB/s | 70MB/s | -- |
| Samsung EVO U1 64GB | UHS-I | 22MB/s | 42MB/s | Amazon |
| Kingston V30 A1 128GB | UHS-I | 40MB/s | 74MB/s | Amazon |
| Kingston V30 128GB | UHS-I | 40MB/s | 74MB/s | Amazon |
| ProGrade V60 64GB | UHS-II | 67MB/s | 79MB/s | Amazon |
| Lexar 1800x 64GB | UHS-II | 37MB/s | 83MB/s | |
| Lexar 1000x U3 64GB | UHS-II | 38MB/s | 79MB/s | Amazon |
| Lexar 633x A2 V30 128GB | UHS-I | 38MB/s | 86MB/s | |
| Lexar 633x U1 64GB | UHS-I | 24MB/s | 75MB/s | Amazon |
| Lexar 300x U1 64GB | UHS-I | 24MB/s | 42MB/s | Amazon |
| Delkin V60 64GB | UHS-II | 71MB/s | 77MB/s | Amazon |
| Delkin V30 128GB | UHS-I | 43MB/s | 77MB/s | Amazon |
| Delkin U3 64GB | UHS-I | 70MB/s | 74MB/s | Amazon |
| Sony V30 128GB | UHS-I | 39MB/s | 75MB/s | BHphoto |
| Transcend A1 V30 128GB | UHS-I | 40MB/s | 79MB/s | Amazon |
| Transcend Ultimate 633x U3 64GB | UHS-I | 42MB/s | 75MB/s | Amazon |
| Transcend 400x U1 64GB | UHS-I | 24MB/s | 76MB/s | Amazon |
| Transcend 300x U1 64GB | UHS-I | 24MB/s | 76MB/s | -- |
| Transcend High Endurance C10 64GB | UHS-I | 21MB/s | 22MB/s | -- |
| PNY Elite-X A1 V30 128GB | UHS-I | 45MB/s | 78MB/s | Amazon |
| PNY PRO Elite U3 128GB | UHS-I | 70MB/s | 74MB/s | Amazon |
| PNY Elite U1 128GB | UHS-I | 28MB/s | 76MB/s | Amazon |
| Amplim A1 V30 667X 128GB Gold | UHS-I | 38MB/s | 80MB/s | |
| Amplim A1 V30 667X 128GB Purple | UHS-I | 40MB/s | 81MB/s | |
| Amplim A1 V30 667X 128GB Green | UHS-I | 41MB/s | 81MB/s | |
| Netac Pro A1 U3 128GB | UHS-I | 37MB/s | 83MB/s | |
| Netac Pro U3 64GB | UHS-I | 35MB/s | 69MB/s | Amazon |
| Pariot U1 64GB | UHS-I | 20MB/s | 55MB/s | Amazon |
Samsung Galaxy S20 vs. S20+ vs S20 Ultra – Phone Comparison
Since you’ll likely be using the S20 additional storage for photo and video, here are the photo/video related spec for each camera.
| Specs | S20 | S20+ | S20 Ultra |
| Processor | 7nm 64-bit 2.8 GHz, Snapdragon 865 | 7nm 64-bit 2.8 GHz, Snapdragon 865 | 7nm 64-bit 2.8 GHz, Snapdragon 865 |
| Ram | 12GB | 12GB | 12GB |
| Internal Storage Max | 128GB | 512GB | 512GB |
| Ultra-Wide Lens | 12MP 13mm f/2.2 | 12MP 13mm f/2.2 | 12 MP 13mm f/2.2 |
| Wide Lens MP | 12MP 26mm f/1.8 | 12MP 26mm f/1.8 | 108 MP 26mm f/1.8 |
| Tele Lens MP | 64MP f2 | 64MP f2 | 48 MP 1/2″ Sensor f/3.6 |
| Slow-Mo | 960fps 720p / 240fps 1080p | 960fps 720p / 240fps 1080p | 960fps 720p / 240fps 1080p |
| Video Specs | 4K 60 fps | 4K 60 fps | 4K 60 fps |
Best Memory Cards Samsung Galaxy S20, S20+, S20 Ultra Conclusions
Expanding your storage on the Galaxy S20 line of phones shouldn’t be too complicated.
You have a maximum capacity of 1TB, then you just have to decide to go A2 or standard non-A cards. After using an A2 card in my S10+ for a year I have to say, that I’ve never noticed the slower transfer speeds compared to faster non-A cards, and I have the peace of mind knowing that my apps that I load onto my card (if I ever do such things) perform at their maximum performance.
