How to clone the internal JBOD disk to a larger one?

If your device is two bays model, then you can insert the new disk, then copy the data from small disk to new disk.

For me, I only know if device is 1 bay model, then use Linux PC or bootDVD such as Ubuntu bootDVD, insert the small disk to PC's sata port and boot, then PC can read the data from small disk, and able to copy from PC to NSA/NAS via samba.