The car DVR is a device that intensively records to a storage medium. It is usually a microSD memory card. However, not every one is suitable for a DVR. In this article, we will talk about which memory card to choose for the DVR so that it can cope with the load of constant recording.

Memory card for the DVR: how to choose

Memory card for the DVR: how to choose?Before addressing the issue of choosing a memory card, we recommend that you carefully read our article:

  • How to choose a memory card, and why it can not be done carelessly

In it, we tell you what kind of memory cards exist and explain in detail all their characteristics, such as speed class, format and memory capacity. We also explain how to correctly read the markings on the card to understand what it is capable of.

What kind of memory card is needed for the DVR?

Modern DVRs record video in HD / FullHD / QHD resolution, and some in 4K. Therefore, not any SD card is suitable for the device. It is important that it can handle recording high-quality video in real time. And this requires a high speed of data recording. Let’s try to understand which card will exactly cope with such a load.

Speed ​​class

Manufacturers often write in the instructions that the DVR is designed to support microSD memory cards. 10 speed class. This means that the card must support a minimum write speed of 10 Mbps. The actual speed, however, can be much higher, but this can only be measured after buying a card with special programs – for example, the free Check Flash.

In any case, the DVR needs a speed class of at least 10. Cards with this speed class are marked with this icon:

All class 10 memory cards support the UHS (Ultra High Speed) standard, thanks to which they work with data at a speed measured not in megabits, but in tens of megabits per second.

The choice of a memory card for a DVR is best based on the following logic:

  • If your DVR records HD/FullHD videoyou can use a memory card with write speed UHS 1 — from 10 Mbps. It is marked with this icon:

For example, this map Transcend microSD 300S Class 10 UHS-I U1 A1which we use as an example:

  • If your DVR works in QHD/4K formatsthen a memory card with write speed is better for you UHS 3 — from 30 Mbps. You can recognize it by this icon:

For example, this card Samsung MB-MC128GAwhich we have given as an example:


Based on the speed of data processing, we can determine which card format will be best for your DVR. Although, as a rule, the manufacturer must indicate what format of memory cards his device works with.

In any case, it is recommended to purchase microSD card with SD adapter. So you don’t have to worry about what size the card should be and whether it will fit in the registrar’s slot.

  • If a memory card suits you UHS 1, then you can not pay extra money and get not the fastest card. For example, here is an ADATA Premier:

  • If you need a memory card UHS 3, you will have to pay attention to more expensive models. For example, on SanDisk Extreme SDXC Class 10 UHS Class 3 V30:

Before choosing which memory card to buy for the DVR, check the instructions for which card formats the device supports. There are also UHS 1 cards with write speeds in excess of 30 Mbps, and you can save money by purchasing one of these:

Memory size

Memory card for the DVR: how to choose?This parameter directly depends on the card format. Card memory capacity microSDHC limited to 32 GB. Cards microSDXC may be 32 GB or more.

The lower the quality and resolution that your DVR shoots, the less memory card you can get by with. Accordingly, if you have top quality and high resolution, you need more volume. In addition, if your DVR supports GPS, coordinates and various metadata are added to the recorded video, which further makes the video heavier – this must also be taken into account.

The minimum memory card size for the DVR is 32 GB. This is the minimum for microSDXC and maximum for microSDHC. This amount of memory will fit approximately 160 minutes of Full HD video and approximately 120 minutes of 4K recording. At the same time, it should be understood that the larger the memory capacity of the card, the slower its resource will be spent, and the longer it will live.

Older DVRs may not support 32GB cards. In this case, you can get by with a 16 or 8 GB card, making sure that it has the right class and UHS write speed.

Read also:

  • How to choose a memory card, and why it can not be done carelessly
  • How I bought a memory card on Aliexpress and regretted it: personal experience

Photo: Wikimedia Commons, manufacturing companies


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