Brief explaination of the difference between hard drives and ram.
Your hard drive is the permanent storage for all of the information on your computer, a bit like a cupboard, it's where the computer keeps everything it's ever likely to need. it takes the computer a long time to get anything from the hard drive if it needs it
the RAM is where the computer temporally stores anything it is in the process of using for any reason, so if the hard drive is a cupboard the ram is like the work bench. the size of the ram is always much smaller than the hard drive because it's only used by things as needed, nothing stays in ram permanently as it is cleared when the power is switched off, but the ram is much much faster than the hard drive, so once the computer has got what it needs from the hard drive and put it in ram it can get to it again much faster.
Then you have virtual RAM. Virtual RAM a section on the hard drive that the computer uses as overspill for your real RAM. meaning that if you have a very small amount of real RAM in the computer then it will get full very quickly so information is moved from the real RAM to the virtual RAM, because the virtual RAM is on the hard drive it is a lot slower than real RAM and this is why a computer with a low amount of real RAM will run very slowly, this also means that the Virtual RAM will run out of space more often because you have not got sufficient space in your real RAM to store everything needed.
The only real way to solve this problem is to install more real RAM (you can increase the virtual RAM size, but doing so is not a good long term fix)
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