nrf51288-DK storage

Great! Glad that's all working for you now. Since you are now using all available flash for Storage, you may find the Flash module isn't too useful for you.

wondering why nrf51822-dk image is not available on the official image download page?

While Espruino is Open Source, it still takes effort to maintain the builds - and I can't afford to spend all by time working on supporting new hardware that I don't get paid for. As a result, builds generally only get put up if:

• They're for an official Espruino board
  
• They're for a board where the owners pay me to keep builds running
  
• There's a lot of community involvement/support - eg. ESP8266/ESP32
  
• They were there for historical or educational reasons - eg. Microbit