In ASUS WebStorage for Web> account settings, you can find the "daily sharing download amount," which will be consumed when using the following sharing methods. For example, if you share a 10 MB file that is downloaded twice, 20 MB of your "daily sharing download amount" will be used up.
The "current usage" under "daily sharing download amount" resets every day, so if you go over the limit, you'll have to wait until the following day to download again.
Public share
When you set a file/folder as a "public share" and someone downloads it using the shared link, your account's "daily sharing download amount" will be consumed.
Learn how to set a file/folder as a "public share."
Shared only with collaborators
When you set a file/folder as "shared only with collaborators" and a collaborator downloads it, your account's "daily sharing download amount" will be consumed.
Learn how to set a file/folder as "shared only with collaborators."