Plenty of memory cards are available in the market. Each memory card comes with different numbers on it. these determine the features of the card. These also help you to select an appropriate memory card for your smartphone or DSLR camera. but they are hard to understand for a novice user. Well! here is a detailed description of the numbers present on the memory card.
For SD Card:
1. Maximum Read Speed –
A read speed indicates how fast can data be transferred, It is presented as MB/s. the higher the Maximum read speed the faster your memory card is. Here, the maximum read speed of the card is 30MB/s. That means that the SD card is capable of transferring up to 30 megabytes a second.
2. Capacity –
The capacity or storage limit of a memory card indicates its size and indicates the maximum amount of data that it can store at any given point in time. In this image, 32 GB is the capacity of the card. This indicates that the memory card can store up to 32 GB of data.
3. Type –
SD card types are an important factor to consider, each type has a different architecture, size, specifications, and compatibility standards. The most common types of memory cards are SD cards, CF cards, and so on. Here it represents the SDHC card.
4. Speed-Class Rating –
A speed class rating indicates the minimum speed at which the memory card operates. Memory card speeds are divided into classes 10, 6, 4, and 2, with Class 10 being the fastest and 2 being the slowest.
5. UHS Rating –
The UHS or ultra-high-speed rating decides the bus speed at which a card can read and write. UHS-I indicates that the card has maximum 104 MB/s read speed whereas UHS-II cards support a maximum read speed of 312 MB/s. It is extremely useful when recording with professional cameras or storing 4k videos
Compact Flash Card:
1. UDMA rating –
Ultra Direct Memory Access or UDMA explains the maximum bus speed of the card at which a card can read. UDMA 1 supports a maximum read speed of 16.7 MB/s and UDMA 7 supports up to 167 MB/s. With SD cards, UDMA has grown obsolete. Today we use newer technologies like SATA or NVMe.
2. Write speed –
It indicates the speed at which images and videos can be written onto your card.
3. Max Read Speed –
It determines the speed of the card at which rate the transfer process will be carried out.
4. Capacity –
The number shows how much space it has to store the data on it. Here, the card is shown to have 256 GB of storage.
To Conclude:
Based on your requirements, select the appropriate card. If you use a memory card that is not compatible with your devices, then more read-write processes on it exceeding its capacity may lead to memory / SD card corruption and may even become raw.
If your memory card / SD card becomes RAW, you will lose access to all your data on it. The only way to get back your data from RAW or corrupt memory / SD cards is by using Remo Recover Software. Hence, you should be careful while selecting the card.
Frequently Asked Questions
The V symbol represents the Video speed class that denotes the video recording performance of the SD card.
Memory cards do not have a definite expiry date, but they can wear out over time with usage.
The highest capacity SD card is the SDUC card which starts from 2TB and goes up to 128TB
