All computer systems are usually equipped with two kinds of storage, the first is the volatile storage and the second is the non-volatile storage. The difference between the two storage, is that the volatile one has the capacity to hold data only until the power is turned on, once the power is cut all data is immediately lost. This is not the case with non-volatile storage, where all the data stored within, once written into it, will hold the data even after the power has been cut off, and these too more many hundred years at a time.
Non-volatile storage is the ideal solution for those who require data to be stored for a longer period of time. As opposed to non-volatile storage, volatile storage is used for many other purposes that do not require the necessity of storing data for long periods of time. Since it only has a capacity to store information for a limited period, the systems uses it to hold temporary data. One of the reasons for this is the speed at which the volatile storage works. Its speed is at such a high level, that it keeps on processing non-stop leaving no space for a hold up in processing.
There are many storage devices that fall under the non-volatile category which includes, a hard drive, a solid state drive and even different types memory cards. Whereas volatile memory includes mostly RAMs. Each of these storages are used for different purposes, and is majorly differentiated by its storage capacities. Volatile memory tend to be more expensive than the non-volatile ones because the capacities are much lower ranging from a MBs to few GBs, as opposed to capacities ranging from GBs to a few TBs in non-volatile storage.
Even though the two types of storage solutions a rather different, they tend to make a computer function a whole lot better when brought together. Having a device that allows you to expand both the memory capacities will provide the user with a performance induced experience. The volatile storage will bring in a complete enhancement in the systems performance, which will significantly help in multitasking. Whereas installing the non-volatile storage such as a solid state drive will provide you with space to store more data and files.
All in all, you have to first make sure as to what solutions your system needs. Thoroughly inspect the system, and figure out which areas need the most work, and then go on to buy memory accordingly to enhance and improve the system. What you must mostly look into is not allowing there to be clog of processing, which should theoretically have to be continuously running.
Whatever solution you are looking for, you will be able to find in any computer hardware and accessory shops. Just make sure you are opting for the correct solution.