Do it the Same way you organize nuts and bolts....you don't mix bolts and screws and if you have enough, it's by size and/or SS,Bronze,Rust
... keep them in their own folders...most raster charts have numbers. Sort them that way...Alaska is 17000's and then sub-folders if you have too many..17300 + 17400 etc.Include the number first and the area second in the name of the folder.
Should be worldwide...But be happy. You can sort however you like.
put pilot charts and miscellany in separate folders!
Be aware that if you point OpenCPN
to a folder, she will load all the SUB folders inside it, so don't just load "C:\Charts
" ! It's like dumping the entire drawer onto the cabin sole
The new Chartgroup feature is coming...But you can do a lot now without it.
load "C:\Charts\ 17_Alaska
" or "C:\Charts\17_Alaska\174_AlaskaPanhandle
...if you want pilot charts, load em all from C:\Charts\PilotCharts
or put the one you want into a sub-folder
of "PilotCharts" folder...as in C:\Charts\PilotCharts\NorthPacific
...and so on through the collection. To load a thumbdrive, keep the same folder layout but take out all the folders or just the charts you don't need .This'll keep it easy for you, being what you are used to and easy to add subtract from..