8GB memory card recovery,recover data from 8GB memory card
- Publish Time：2018-09-25 08:51
8GB memory card identification
The 8GB memory card is small in size. The average consumer will not have much understanding before purchasing. Therefore, it is difficult to distinguish the appearance. Let us introduce the common 8GB memory card identification method on the market: First, look at the storage. The card itself, 8GB memory card is attached to the front of the laser color change label, laser color changes will be produced at different angles. Secondly, the domestic licensed genuine cards are all packaged in plastic packaging similar to the above, but the words “5-year guarantee” and Japanese in the lower right are changed to the 5-year warranty indicated by the graphic.
In addition, it is also possible to make the simplest identification from the bottom of the SD card. Because the number above the origin of the genuine 8GB memory card is unique, and the authenticity can be queried through 800 telephones, it is said that this query system is not yet ready. .
Different models of MMC/SD card
The 4GB SDHC card SD card is not the only memory card standard approved by the Secure Digital Card Alliance. Other approved formats include miniSD, microSD (called TransFlash before the Alliance failed the standard) and SDHC.
These smaller cards plus an adapter can also be used in full-size MMC/SD/SDIO slots. It is very difficult to know that the SD-size I/O device standard has been developed. It is not realistic to develop a smaller size.
The SD slot supports the MMC card, and the smaller MMC card variant is also compatible with devices that support the SD card. Unlike miniSD and microSD, the RS-MMC slot is compatible with full-size MMC cards. Because the RS-MMC card is just a shortened MMC card. For related information, please refer to the Multimedia Card (MMC).
In response to the SD card's standard capacity limit of only 4GB, not enough to cope with rising capacity requirements, the Alliance has developed a new SDHC standard. The SDHC card has the same appearance as a normal SD card, and the lower limit of the capacity is 4GB. It is expected that an SDHC card of up to 32GB can be released during the year.
Memory card common fault analysis and solution
Users with SD expansion phones often encounter some distress, sometimes the card is inserted several times, but the phone still can't read correctly. At this time, you need to think about it carefully to see if there is something wrong with it. The specific analysis is as follows:
(1) SD card chip is not clean
Because some users do not protect the chip very well, it is often dusty or oily, which causes the card to be abnormal.
Judgment method: Observe whether the metal area on the card is dim or spotted.
Treatment method: use cotton cloth with a little alcohol or water to gently rub, wait until the water is dry and then re-insert.
(2) Unstable battery voltage
Since the quality of the card reading is very strict on the power supply, sometimes the battery purchased in the market instead of the original power is also likely to cause the card to be unsatisfactory.
Judgment method: In the case of using non-original power, if the standby condition is not satisfactory, the battery should be suspected.
Treatment method: re-test the original electricity
(3) The card slot is squeezed
For some ultra-thin machines, the card slot design is very clever. If you use some irregular batteries on the market, if the thickness exceeds certain requirements, the card slot will be squeezed, resulting in a bad card reading.
Judgment method: change the original electricity to see
Treatment method: use the original electricity. And use some things to lift the card slot up``
(4) The wire inside the card slot is rusty or over-curved
Since some card readers support hot plugging, frequent card insertion can cause excessive or rusting of the wires that read the card data in the card slot.
Judgment method: Point the card slot against the sunlight and observe if the wire contacts are at the same height. If it is not, it may be the problem.
Treatment: You can try to pick the wire down with a needle.
(5) SD infected with virus
For some smartphones, SD is infected with a virus on the computer, which also causes the card to not be read properly.
Judgment method: SD can be read by computer and scanned.
Solution: Format the card or other low-end storage (such as a camera). If you format it on a computer, you should use the FAT format instead of the FAT32 format.
(6) SD card is not formatted normally
Since the format of the mobile phone and the computer are not the same, it is fine to re-define the file format with the computer according to the instructions. If you have a card reader to try on the computer, check the SD card, please be sure to check whether the card format is FAT, because the FAT32 E680 is unrecognizable.
(7) The SD card is broken.
It is easy to judge that the card is inserted into the computer with a card reader, and reading can indicate that the card is good.
(8) There is a problem with the mobile phone reading card.
It belongs to the mobile phone failure, and can only be repaired.
General 2G.4G.8G.16G.32G.64G.128G mobile phone memory card memory parameters: 2G memory is not higher than (1.8GB), 4G
Memory is not higher than (3.8GB), 8G memory is not higher than (7.5G), 16G memory is not higher than (15GB), 32G memory is not higher than (30GB), 64G memory is not higher than (60GB), 128G memory is not high If (120GB) is higher than the memory capacity, it may be fake card, water card, expansion card, you can use the direct method to test, fill the memory card with the movie playback test, if the file disappears, it must be a fake card. It will also lead to incompatibility for a long time. General C2.C4.C6.C8.C10 memory card speed parameters: Class2 read and write is not lower than (2MB / sec), Class4 read and write is not lower than (4MB / sec), Class6 read and write is not lower than (6MB / sec) Class8 reading and writing is not lower than (8MB/sec), Class10 reading and writing is not lower than (10MB/sec). If it is lower, it may be parallel or fake.