Acer Chromebook 11双系统SD卡共享求助：Ubuntu 16.04 Xfce与Chrome OS共用64GB存储卡

Absolutely, you can set up seamless file sharing between both systems without relying on the tedious Downloads folder workaround. Here's a step-by-step guide tailored to your setup:

Step 1: Format the SD Card in Chrome OS #

First, prep the card for cross-system compatibility:

• Insert your SD card into the Chromebook. It should auto-mount and appear in the Files app automatically.
• Right-click the SD card in the Files app and select "Format device".
• Choose one of these file systems based on your needs:
  • FAT32: No extra software needed in Ubuntu, but limited to 4GB per file. Ideal if you don't work with large media files.
  • exFAT: Supports files larger than 4GB, but requires installing a few packages in Ubuntu (we'll cover this later).
• Name the drive something simple (e.g., SharedSD) and start the formatting process. Wait for it to complete fully.

Step 2: Set Up Ubuntu 16.04 Xfce to Access the SD Card #

Boot into Ubuntu and follow the steps for your chosen file system:

Case 1: Using FAT32 #

• Ubuntu should detect the FAT32 card automatically. Open Thunar (Xfce's default file manager) and click the SharedSD drive in the left pane to mount it. You can now read/write files here, and any changes will sync instantly with Chrome OS.
• To auto-mount the card on boot (so you don't have to click it every time):
  1. Open a terminal with Ctrl+Alt+T.
  2. Run sudo blkid to find your SD card's UUID. Look for the entry labeled SharedSD and copy the UUID string (it’s a long alphanumeric sequence wrapped in quotes).
  3. Create a permanent mount point:

     sudo mkdir /mnt/sharedsd
     

  4. Edit the fstab file to add the auto-mount rule:

     sudo nano /etc/fstab
     

  5. Paste this line at the end, replacing YOUR_UUID with the UUID you copied:

     UUID=YOUR_UUID /mnt/sharedsd vfat defaults,uid=1000,gid=1000,utf8 0 0
     

     The uid=1000,gid=1000 ensures your user account has full read/write access (instead of only root having permissions).
  6. Save and exit nano: Press Ctrl+O, hit Enter, then Ctrl+X.
  7. Test the mount with sudo mount -a. If no errors appear, it worked. The SD card will now mount automatically at /mnt/sharedsd on boot—you can add a shortcut to this folder in Thunar for quick access.

Case 2: Using exFAT #

Ubuntu 16.04 doesn’t support exFAT natively, so first install the required packages:

1. Open a terminal with Ctrl+Alt+T.
2. Run these commands to install exFAT support:

   sudo apt update && sudo apt install exfat-fuse exfat-utils
   

3. Once installed, you can mount the SD card manually by clicking it in Thunar. To set up auto-mount on boot:
   • Follow steps 2-7 from the FAT32 case, but use this line in /etc/fstab instead:

     UUID=YOUR_UUID /mnt/sharedsd exfat defaults,uid=1000,gid=1000,utf8 0 0
     

Step 3: Verify Cross-System Sharing #

• Create a test file on the SD card in Chrome OS, then boot into Ubuntu—you should see it immediately in the mounted folder.
• Conversely, create a file in Ubuntu on the SD card, boot back to Chrome OS, and it will appear in the Files app under your SD card.

Troubleshooting Tips #

• If Ubuntu doesn't detect the SD card: Run lsblk in the terminal to check if it's listed (look for /dev/mmcblk1 or similar—Chromebooks typically use mmcblk devices for SD cards). Ensure the card is properly inserted.
• Permission errors: Confirm your user's UID/GID with id in the terminal (it's almost always 1000 for the first user). Double-check these values in your fstab line.
• exFAT not working after installation: Reboot Ubuntu—sometimes the kernel modules need a restart to load correctly.

内容的提问来源于stack exchange，提问作者user769070