Use file naming conventions that makes your files consistent and easy to find. The first part of the file name should be based on how you will want to find your data. For example, if the date is more important, use that first.
Use nested folders in a way that is easy to use and based on how you will try to find data. Use the most important attribute as the top file. For example, year then location. Some general rules include:
When working with different versions of data, document what changed, who did, and why.