There is a thread on this in the technical section complete with pictures on how to do it
RNS-510 HDD replacement/SSD swap DIY
Also one for upgrading firmware which is pretty easy to do. Firmware updates for RNS510 units in Australia/NZ
Your firmware version is found by holding in the setup button till a screen with version information appears and press that.
All will be revealed.
Maps are not available on here any more We have to buy them to stay legal.
Its a lot of work for what I would say is not a lot of gain.
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