SanDisk Ultra 128GB micro SD card

Anyone reading my blog will probably have noticed that I don't use anything other than SanDisk memory cards. Of course there is a cheaper alternative with the Samsung memory cards, which presumably also works reliably, but with the SanDisk cards I have not come across a case in which the card would have failed in recent years. I don't really care whether I pay 5 euros more or less if I know that my recordings are in good hands.

Why I only buy SanDisk memory cards ...

Why I only buy SanDisk memory cards ...

Record a maximum of FullHD material with the SanDisk Ultra

The SanDisk SD cards belong to the microSD cards, which usually achieve significantly higher transfer rates than the speed class standard UHS U1 or Speed ​​Class 10 requires, but frame drops can still occur in an emergency (i.e. skipping individual video images) when backing up when the SD card is working at its limit.

For this reason, the recommendation is not unfounded to use the SanDisk Extreme or Extreme Pro for recording 4K video. These meet the requirements for the UHS U3 or V30 standard and are fast enough for such amounts of data.

Due to the writing speed, the SanDisk Ultra microSD cards should only be used for FullHD video and not for recording 4K videos (photos: Sir Apfelot).

Due to the writing speed, the SanDisk Ultra microSD cards should only be used for FullHD video and not for recording 4K videos (photos: Sir Apfelot).

The SanDisk 128GB MicroSD cards on Amazon

The selection and prices of SD cards fluctuate almost daily on Amazon. For this reason I have included the current bestsellers from SanDisk with 128GB capacity for you. Whether you choose the Ultra, Extreme or Extreme Pro is up to you.

However, I've recently gotten the Extreme Pro to read the data from the memory card to have as little waiting time as possible. And faster cards never hurt and are generally more prepared for future cameras than slower memory cards.

6,70 EURBestseller no. 1 SanDisk Ultra microSDXC UHS-I memory card 128 GB + adapter (A1, Class 10, U1, Full HD videos, up to...
Bestseller no. 2 SanDisk Extreme PRO microSDXC UHS-I memory card 128 GB + adapter & Rescue Pro Deluxe (For...
Bestseller no. 3 SanDisk Extreme microSDXC UHS-I memory card 128 GB + adapter & Rescue Pro Deluxe (For ...
1,51 EURBestseller no. 4 SanDisk Extreme microSD card for mobile gaming 128 GB, Supported with A2 App Performance...
5,00 EURBestseller no. 5 SanDisk Extreme microSDXC UHS-I memory card 128 GB for action cams and drones + adapter +...
7,00 EURBestseller no. 6 SanDisk Extreme microSDXC card for mobile gaming 128 GB (Supported with A2 App Performance...

128GB Micro SD Cards - The Right Size?

In the meantime, memory cards have capacities between 32 and 512GB. Most of the time, none of the sizes are suitable anymore because there is not enough video and photo material to fit on and the largest cards are often disproportionately expensive. For this reason I would - without knowing the application in more detail - to a 128Gb or 64GB SanDisk Ultra microSD Guess card.

In many applications, however, the 64GB card is already at its limit. Even if you take photos with a drone, for example, and rarely get out of the 64GB storage space, you can still use a larger SD card and simply leave the older recordings on the memory card as a backup. That's how I always do it with my DJI drones and cameras.

How many photos fit on 128GB?

In order to better assess whether you have enough storage space with a 128GB memory card or whether you should rather use a 256GB card, it often helps to have values ​​for comparison. For this reason, I am giving a few rough examples that reveal how many photos or minutes of 4K video can be saved on a 128GB memory card.

  • 4K video (100 Mbit / s + 30fps): approx. 2:30 h
  • Full HD video (50MBit / s + 30fps): approx. 5:00 h
  • 24MP RAW photos (24MB per image): Approx. 4600 images
  • 24MP JPG photos (6,5MB per image): approximately 16.600 images
  • 12MP JPG photos (3,6MB per image): approx.30.400 images
Photo: The SanDisk Ultra 128GB microSD card with the marking for the speed classes Speed ​​Class 10 and UHS U1 (Photo: Sir Apfelot).

Photo: The SanDisk Ultra 128GB microSD card with the marking for the speed classes Speed ​​Class 10 and UHS U1 (Photo: Sir Apfelot).

SanDisk Ultra write speed

There are some models of the SanDisk Ultra memory cards, such as those with 200 or 400 GB, that do not have a minimum write speed rating. The reason for this is that they are used as memory expansion for smartphones and that a permanently high writing speed is not important.

For this reason I am only talking about the write and read speed of the 128GB variant, which has a Speed ​​Class 10 and a UHS Speed ​​Class U1 rating. This can be seen on the card with the imprint "10" in a circle and a "1" in a "U".

When writing and reading one GB of data, the SanDisk Ultra achieved about 19 MB / s when writing and about 80 MB / s when reading.

When writing and reading one GB of data, the SanDisk Ultra achieved about 19 MB / s when writing and about 80 MB / s when reading.

For these speed classes, the memory card must be able to write data continuously over a longer period of time at at least 10 megabytes per second without falling below this value. In tests by customers on Amazon, the card achieved around 78 MB / s reading and 21 MB / s writing. So it was well above the required 10 MB / s.

I have the read and write speed myself with the tool Aja system test tried it out and got 3 MB / s for writing and 19 MB / s for reading via a USB 80 card reader with USB-C adapter on my MacBook Pro.

In the detailed graphic, which shows the chronological progression of the write speed of the SanDisk Ultra, you can see that it periodically slows down while writing, but only drops below 13 MB / s. However, the limit for the Class 10 and U1 ratings was 10 MB / s, which the SanDisk Ultra 128GB easily manages.

The writing speed of my SanDisk Ultra periodically dropped to its knees, but never fell below the important value of 10 MB / s.

The writing speed of my SanDisk Ultra periodically dropped to its knees, but never fell below the important value of 10 MB / s.

The A1 or A2 classificationthat you may find on this card is only of interest for use in smartphones and has no relevance for photography or recording videos.

With the Insta360 One X, the SD card is inserted into a slot at the bottom (Photo: Sir Apfelot).

With the Insta360 One X, the SD card is inserted into a slot at the bottom. I use the SanDisk Extreme here because it can handle the 5,7K video that the Insta One X delivers (Photo: Sir Apfelot).

Recommendation: Use the SanDisk Extreme 360GB for 128-degree videos

I have an Insta One X 360 degree camera that records videos at 5,7K and 30 frames per second. As mentioned above, the SanDisk Ultra does not manage to reliably secure the 5,7K video stream. That's why I'm using the SanDisk Extreme here.

Recommended reading: Which memory card for the Insta360 cameras (One X / Pro 2 / Titan)?

Why with 128GB and not 64GB? The bit rate is not very high, but since you only get just over an hour of recording time with a SanDisk Ultra 64GB SD card, it is safer to grab 128GB straight away.

The Insta One X's battery also lasts about an hour, but I always leave old recordings on the memory card as a backup. With 128GB capacity, I would always have to empty the card after use so that an error message about insufficient capacity does not occur during recording.

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The page contains affiliate links / images: Amazon.de