I run a typing club and often encounter such problems. I suggest you enter your email address in the recipient's address, then send it to yourself and open it in the inbox to see if you can see the attachment!

Remember in the future, either save the network disk or send it to yourself!

I suggest that when you download, don't use any tools to download, just save it as, and you can download it normally!

I found this problem the other day. If there is thunder, it is not allowed to download at all, or it stops in the middle of downloading. If you download it directly, it will be faster and you can download it successfully!

It is also possible that the security level of your browser is too high, so it is recommended to lower it. Also, if you have a firewall, it is recommended to temporarily stop protection!