MulongDeng Thanks, this helps.
The 62% usage is on the shared userdata partition (/dev/sda11), not mainly in oak-agent or app storage. In your output, /overlay/oak-agent is only about 3.8G, so it does not explain the full 46.2G used on the device.
So the remaining space is likely being used elsewhere on the same partition, such as /data, /home, /cache, or another overlay-backed path. Also, the repeated 62% lines in df -h are expected here, they are different mountpoints backed by the same underlying partition, not separate usage totals.
Which Luxonis OS version do you have?
To narrow down where the space is going, the next useful checks would be:
du -xhd1 /data 2>/dev/null | sort -h
du -xhd1 /home 2>/dev/null | sort -h
du -xhd1 /cache 2>/dev/null | sort -h
du -xhd1 /overlay 2>/dev/null | sort -h
