java.io.UTFDataFormatException - encoded string too long: 477616 bytes

[Gareth Murfin]

Preferences.set(key, value);    seems to have a limit on size, anyway to get around that or do I just use a different way to store?

[Shai Almog]

If you reached that limit you shouldn't use preferences. Performance would grind to a halt!
Preferences is designed for small values, cached user names, auth keys etc. Anything bigger should go into a file.