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Currently, the market offers various memory card capacities, and users select based on their technological device needs. Among the most chosen capacities today is the 4GB memory card. So, what is a 4GB memory card, and which are the best 4GB memory card options? Join us in exploring this article.
1. What is a 4GB Memory Card?
The capacities or standards of memory cards are regulated by the SD Card Association. According to this, memory cards are categorized into 4 types based on their storage capacities:
SD Card (Secure Digital): also known as SD1.0, with storage capacities ranging from 128MB to a maximum of 2GB. The file system used is FAT12 and FAT16.
- SDHC Memory Card (Secure Digital High-Capacity): also known as SD2.0, with a capacity ranging from 4GB to 32GB. The file system used is FAT32.
- SDXC Memory Card (Secure Digital eXtended-Capacity): also known as SD3.0, with a capacity ranging from 64GB to 2TB. The file system used is exFAT.
- SDUC Memory Card (Secure Digital Ultra Capacity): also known as SD3.0, with a capacity ranging from over 2TB to 128TB. The file system used is exFAT.
So, a 4GB memory card will fall under the category of SDHC memory cards. Besides, based on the physical size of the memory card, it is divided into 3 types: SD, Mini SD, and Micro SD.
2. Compatibility of 4GB Memory Card and Devices
When buying a 4GB memory card, users need to pay attention to the compatibility of the card with their devices. If your device supports SDHC, SDXC, and SDUC memory card slots, you can comfortably use a 4GB memory card. However, if your device only supports SD cards, you won't be able to use an SDHC memory card, meaning a 4GB card, as they are not compatible.
3. Speed of the 4GB Memory Card
Initially, general SD cards or specifically 4GB memory cards had a default speed of 12.5MB/s. Subsequently, higher-speed communication standards were introduced by the SD Card Association: HS, UHS-I, UHS-II, UHS-III, and SD Express. Specifically, as follows:
- 4GB Memory Card using High-Speed standard: speed of 25MB/s
- 4GB Memory Card using UHS-I standard: speed of 50MB/s
- 4GB Memory Card using UHS-II standard: speed of 156MB/s for Full Duplex and 312MB/s for Half Duplex
- 4GB Memory Card using UHS-III standard: speed of 312MB/s for Full Duplex and 624MB/s for Half Duplex
- 4GB Memory Card using SD Express standard: speed of 985MB/s using PCIe Gen 3.
4. Some Popular Brands of 4GB Memory Cards Today
In today's memory card market, numerous renowned brands with high-quality product lines compete with each other. These are well-known names in the production of electronic devices and accessories in general, as well as memory cards in particular. Among them, Samsung, SanDisk, Transcend, Kingston, Toshiba... are standout names.
The memory card series from these brands share common features of exceptional durability, diverse storage capacities, and integration of modern features.
Above are the fundamental insights into the definition of 4GB memory cards and the best brands in the current market. Hopefully, this information helps you choose a suitable memory card.
