Steps to reproduce:

This is the output of the lsblk command

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda           8:0    0 931.5G  0 disk 

└─sda1        8:1    0 931.5G  0 part /user/ext_hd

mmcblk0     179:0    0 119.4G  0 disk 

├─mmcblk0p1 179:1    0   256M  0 part /boot

└─mmcblk0p2 179:2    0 119.1G  0 part /

Result:

Expected:

Device is detected

File system is not detected in the disk sda1