Android studio Android Studio-新虚拟设备在SD卡创建过程中失败

我正在尝试使用Android Studio上的AVD管理器创建一个新的虚拟设备，运行在Windows 7上

单击“完成”按钮时，我收到一条错误消息。勾选idea.log我看到：

2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection - Invalid argument size '512M' 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -  
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection - mksdcard: create a blank FAT32 image to be used with the Android emulator 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection - usage: mksdcard [-l label] <size> <file> 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -  
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -   if <size> is a simple integer, it specifies a size in bytes 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -   if <size> is an integer followed by 'K', it specifies a size in KiB 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -   if <size> is an integer followed by 'M', it specifies a size in MiB 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -   if <size> is an integer followed by 'G', it specifies a size in GiB 
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection -  
2019-06-07 17:09:59,558 [ thread 48]   WARN - vdmanager.AvdManagerConnection - Minimum size is 9M. The Android emulator cannot use smaller images. 
2019-06-07 17:09:59,559 [ thread 48]   WARN - vdmanager.AvdManagerConnection - Maximum size is 1099511627264 bytes, 1073741823K, 1048575M or 1023G 
2019-06-07 17:09:59,559 [ thread 48]   WARN - vdmanager.AvdManagerConnection - Failed to create the SD card. 
2019-06-07 17:09:59,559 [ thread 48]   WARN - vdmanager.AvdManagerConnection - Failed to create sdcard in the AVD folder.

因为我使用的是IDE接口，所以没有太多的选项，也无法解决问题。有什么解决办法吗

mksdcard.exe 512M mysdcard.img