If you visit the same pages often then they will load faster if it hasn't changed and yah it takes up space but you can set a max size for it. And like they said, delete them before you defrag.
Thanks, I do visit the same pages often, so if I'm not going to defrag should I just leave all the files in the Temporary Internet Files folder and set it to a higher size?
Is it a case of the higher the size of the folder, the quicker the loading times?
If you have a lot of space then you can set to a larger size but a larger cache doesn't mean faster times for a particular page. It means that more pages are stored in your cache so the often visited pages will load faster. So if a page you always visit and always has the same image then if will load off the cache on the drive rather then downloading it again.
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