supply tf card single pack single card small white box memory card storage plastic box memory card protection box

RMB:5-450	RMB:4.8-300	RMB:15	RMB: 14.25	RMB:0.5	RMB:0.4
RMB:0.1	RMB:0.9	RMB:0.6	RMB:0.25	RMB:0.1	RMB:0.9

Are you testing if the memory card has sufficient capacity?

Method 1:

Tested using H2testw.

H2testw Download Link: http://mydown.yesky.com/pcsoft/442704.html

Method Two:

A simpler approach: for example, testing 8G, you can store music or videos that are over 7G. If everything is read properly, it indicates that the card has sufficient capacity.

If it is an expansion card, only the files stored in the front section can be read (the exact size of the expansion will need to be determined), while the files in the back section are damaged and cannot be read.

The TF card, also known as the MicroSD card (small card), differs from the SD card (large card). The MicroSD card is approximately 1/4 the size of an SD card and is one of the most widely used, compact memory cards today. It is suitable for mobile phones, car dashcams, car navigation systems, card-mounted speakers, dance mats, cameras, and other devices. The MicroSD card possesses all the advantages of traditional SD cards. When paired with an SD adapter cover, it can be converted into an SD card and is compatible with devices that use SD cards, meeting the specifications standards of the SD Association.

Product grade standards:

C4 = Class4 = 4M or more low-level writes per second;

C6 = Class6 = 6M or more low-level writes per second;

C10 = Class10 = 1,000 MB or more low-level writes per second;

The indication on this product refers to the memory capacity it has, not the actual storage capacity that can be used.

Reference to the actual usable storage capacity: Neutral card

2GB is approximately 1.83GB;

4GB is approximately 3.71GB;

8GB is approximately 7.43GB;

16GB approximately 14.8GB;

32GB approximately 2.96GB;

*The storage capacity of 1MB is calculated in terms of 1,048,576 bytes. A portion of the storage capacity is used as a management area, so the available storage capacity is as described above.

Origin: Mostly produced in Taiwan

Size: 15mm (L) × 11mm (W) × 1mm (T)

Weight: Approximately 0.41 g

Defective rate: approximately one in a thousand

Interface Type: TF memory card standard specification (8-pin)

Operating Voltage: 2.7～3.6V

Working temperature: 0～55°

Storage temperature: -20～65°

Storage humidity: 30～80% RH (no condensation allowed)

*Reference screenshots for the full H2testw test (TF4GC4):

The actual reading and writing speed depends on the device used and the size of the document, etc.