please help. I do not know what is wrong, or what I have not done well. Cached Bandwidth is very low. I do not understand why it does not store the files.
Without an actual URL of a file you expect to be in the cache, there’s not much we can suggest. It’s possible that what you expect to be cached isn’t actually set to be cached.
What I can say is that Cloudflare has a ton of edge servers, and each one has its own cache that needs a visitor local to that datacenter to request the file before it’s cached. This takes a while. If a file is not frequently used, it won’t stay in the cache.