I just discovered an unlimited storage space called Mimima on the Solon Search Engine. It seems pretty good - no restrictions on bandwidth (traffic) or file size, and no need to install any software. However, three types of files are restricted: pornographic images or adult content, copyright-restricted software, and music, etc.
Additionally, I found something interesting. When downloading, if you enter the link, the webpage might not open. But after entering the code in the "Enter your code" section, you can download it. I'm not sure if this is a bug or done intentionally.