如果您使用的是模拟器，则需要在您的计算机中设置特定的 sd卡值模拟器，以便您可以测试和下载文件.

If you're using an emulator, you need to set a specific sd card value in your emulator so that you can test and download the file.

如果您使用的是设备，请先安装apk，然后尝试下载该文件.并确保设备具有存储卡或 sd卡

If you're using a device then install the apk and then try to download the file. And make sure that the device has a memory card or sd card

因此，您确实需要 sdcard/memcard 来下载文件.

So you really need sdcard/memcard to download the file.