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==How to view the HDD/SSD==1. Check USB device: pi@raspberrypi:~ $ lsusb The result is as follows<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 003: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub</pre> The first line indicates that the USB device has been correctly recognized by the OS.('''JMicron''' is the USB storage chip supplier) 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@geekworm.com'''） with the result information after running the '''lsusb''' command and your order number.
2. View HDD/SSD
3. Check if the hard disk is partitioned.
'''If the hard disk is not partitioned, we need to [[How to Partition a HDD | partition the hard disk]]'''
==How to Partition a HDD==
==How to format HDD/SSD==
pi@raspberrypi:~ $ sudo mkfs.ext4 /dev/sda1
mke2fs 1.46.2 (28-Feb-2021)
/dev/sda1 alignment is offset by 512 bytes.
This may result in very poor performance, (re)-partitioning suggested.
Creating filesystem with 19529494 4k blocks and 4882432 inodes
Filesystem UUID: dc0c2c55-145e-440d-a648-c4909b13c021
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424
Allocating group tables: done
Writing inode tables: done
Creating journal (131072 blocks):
done
Writing superblocks and filesystem accounting information: done
'/dev/sda1'/ is the first partition of the SDA . If you divide SDA into multiple partitions, there may be /dev/sda2, /dev/sda3, etc.
==How to mount HDD/SSD Partition==
pi@raspberrypi:~ $ sudo mount /dev/sda1 /mnt
pi@raspberrypi:~ $ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/root 30354572 8071072 20942064 28% /
devtmpfs 793780 0 793780 0% /dev
tmpfs 958644 0 958644 0% /dev/shm
tmpfs 383460 1296 382164 1% /run
tmpfs 5120 4 5116 1% /run/lock
/dev/mmcblk0p1 258095 50413 207683 20% /boot
tmpfs 191728 24 191704 1% /run/user/1000
/dev/sda1 76314492 24 72392188 1% /mnt
'/dev/sda1' is mounted under '/mnt' folder
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