Now-a-days, many people face problems with system and device spaces. Secondary memory is used in various kinds of devices such as mobile phone, camera, ipod or mp3 player, video player etc. Sometimes hard disk or ROM (CD, DVD) are used in same type of devices. But many people fall into great problem for not having knowledge and experience about the quality of memory and device memory support.
At first you have to know which type of memory you need for your particular device. Whether the device supports memory card or ROM is important. After getting clear idea about it now have a look at the types of memory card. You can get help from the device manual in this case. Rather you can get help from Internet about this.
You need to understand why secondary storage is needed. To place data into every device you must have a storage. For example, consider digital camera. Its function is to capture picture and preserve it digitally into secondary memory. So you must have the idea about this type of secondary memory. If you do not use a compatible memory card you have to face problems. So if you become conscious while buying memory card you can get rid of this situation.
Memomry card is one kind of semiconductor secondary memory. It is such kind of memory which is used everywhere starting from pen drive to most devices. Not only this, its use is so increasing that it becomes a matter of headache for hard disk day by day. For its low power consumption in near future we can hope to replace its use with hard disk. But in the meantime semiconductor based hard disk is released already which can be used to hard disk port directly. Such kind of hard disk is called SSD hard disk. Its semiconductor based memory card is known as flash card also.
In the present market you will get many kinds of memory cards such as compact flash card (CF card), secured digital card, multimedia card (MMC card), sony memory stick, fuzi XD card etc.
This card came to market among all memory cards. This card capacity was higher than other cards for being large size. This type of memory is used mainly in digitl SLR camera. But for its form factor its uses are decreasing day by day.
It is the mostly used memory card. From the mobile phone to other players as well as digital camera this card is used. Moreover, it has replaced CF card from digital camera too. Main reason of its popularity is its form factor (small in size). It is easily found everywhere now.
This card has three form factors. SD Card, Mini SD Card and Micro SD Card. The last one is the smallest between these three. But anyone meet the need joining the micro SD card with adapter. For this only SD card support is needed for the particular device. Same thing can be applied to mini SD card.
Generally this type of card was used in mobile phone. Specially this card was used in nokia phones. In before this card was cheaper than SD card. So most of the people used it. But at present its use is decreasing.
Sony Memory Stick:
Sony made this card at first. This card has many versions like SD card. Among them pro duo, M2 etc. can be mentioned. This card is used in devices made by Sony like mobile phone, camera etc.
Fuzi XD Card:
Fuzi first made this type od card. This card also has many versions. This memory card is used in the cameras made by Fuzi.
In present day, hard disk is used directly in many video camera. These types of hard disks are used in laptop too.
Generally CD or DVD are used as ROM in many video camera.
At last it can be said that you should buy the good quality and good brand memory card always. If you do not buy good brand card then data loss problem may arise. The best way to identify the quality of memory is its warrenty. Every memory has warrenty except ROM. So check the warrenty during purchase. Again check the version also which generally is place in the body of memory card.
Author: Md. Morshedul Arefin