==How to view the HDD/SSD==
1. Check USB device:
pi@raspberrypi:~ $ lsusbThe result is as follows<syntaxhighlight lang="shell" line highlight="1-1"pre>
Bus 002 Device 004: ID 152d:0561 JMicron Technology Corp. / JMicron USA Technology Corp. JMS551 - Sharkoon SATA QuickPort Duo
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
</syntaxhighlightpre><blockquote>
The first line indicates that the USB device has been correctly recognized by the OS. ('''JMicron''' is the USB storage chip supplier)
</blockquote>
If you cannot find the corresponding USB device, please check that your USB device is tightly connected, or replug the USB3 connector, or replace the USB3 connector with a USB-A to USB-A cable.
Sometimes, '''insufficient power supply ''' may also cause the USB device not to be found, so we can also try to replace a high-quality power adapter.
If you have tried these actions and still cannot solve the problem, please contact us （support（'''support@geekworm.com） com'''） with the result information after running the lusb '''lsusb''' command and your order number.
2. View HDD/SSD
pi@raspberrypi:~ $ fdisk lsblk -lp fdisk: cannot open /dev/ram0: Permission deniedThe result is as follows<pre> fdiskNAME MAJ: cannot open /dev/ram1: Permission deniedMIN RM SIZE RO TYPE MOUNTPOINT fdisk: cannot open /dev/ram2sda 8: Permission denied0 0 298.1G fdisk: cannot open /dev/ram3: Permission denied0 disk fdisk: cannot open └─/dev/ram4sda1 8: Permission denied1 0 298.1G fdisk: cannot open /dev/ram5: Permission denied0 part fdisk: cannot open /dev/ram6sdb 8: Permission denied16 0 fdisk: cannot open /dev/ram7: Permission denied74.5G fdisk: cannot open /dev/ram8: Permission denied0 disk fdisk: cannot open └─/dev/ram9sdb1 8: Permission denied17 0 fdisk: cannot open /dev/ram10: Permission denied74.5G fdisk: cannot open /dev/ram11: Permission denied0 part fdisk: cannot open /dev/ram12mmcblk0 179: Permission denied0 0 7.4G fdisk: cannot open /dev/ram13: Permission denied0 disk fdisk: cannot open ├─/dev/ram14mmcblk0p1 179: Permission denied1 0 256M fdisk: cannot open 0 part /dev/ram15: Permission deniedboot fdisk: cannot open └─/dev/mmcblk0mmcblk0p2 179: Permission denied2 0 7.1G fdisk: cannot open /dev0 part /sda: Permission denied fdisk: cannot open </dev/sdb: Permission deniedpre>
The last There are two lines indicate that 2 SSDs devices were found. (/dev/sda and /dev/sdb)