Before using the external storage, you must see if it is available, and if it is writable.
在使用外部存储器之前，必须看看它是否可用，是否可写。
It is mountable concurrently with a writable mount and other snapshots, and this feature is convenient for online backup.
能与可写的挂载和其他快照并发地挂载(？)。这个特性方便了在线备份。
For each suid/sgid file, it also reports whether the file is on a filesystem that contains world writable directories.
对于每个suid/sgid文件来说，它还报告这个文件是否在一个包含人人可写目录的文件系统中。
You can use the transferTo() method to transfer bytes directly from the channel on which it is invoked to another writable byte channel, without requiring data to flow through the application.
可以使用transferTo()方法直接将字节从它被调用的通道上传输到另外一个可写字节通道上，数据无需流经应用程序。
A file is not made writable until it is checked out.
一个文件在签出前是不会变为可写的。
NOTE: it is mandatory for a Writable SD Card to support Security Protocol.
注意：它是可写的SD卡强制性支持的安全协议。
NOTE: it is mandatory for a Writable SD Card to support Security Protocol.
注意：它是可写的SD卡强制性支持的安全协议。
应用推荐