There is no limitation on the number or size of protected files or directories.

要保护的文件或文件夹的数量或大小没有限制。

youdao

You will not be able to open password-protected files, even if you know the password.

您将无法打开受密码保护的文件，即使知道密码也是如此。

youdao

Automatically backup system protected files with the system state.

自动备份带有系统状态的系统保护文件。

youdao

Dotcom adds in that although other services don't have a one-click encryption option built into their interface, the likes of Google Drive allow you to upload encrypted, password-protected files.

CNN: Kim Dotcom on his new file-sharing site, Mega

We also offered solutions to the market that protected music files for industry participants in the era of Napster file sharing.

FORBES: The Case For The PROTECT IP Act And DNS Filtering

For instance the attachments arriving with some Bagle variants took the form of password protected archives or zip files.

BBC: NEWS | Technology | Online virus war is slowing down