why has many PaxHeader in download file?

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**

1. Go to 'file'
2. download a folder
3. u get a xxx.tar.gz
4. open it

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**


**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]

**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.