Copy Data Activity > Source > "File path type" of "Wildcard file path"

Question

I really wish the debugging info could be improved for the "Wildcard file path" type in the "File path type" Source section. It's not at all clear that it's case sensitive and that *.CSV is different than *.csv. Also, when mixing parameters for a dataset with the wildcard paths below, which one takes precedence? Is it additive or does one override the other? I've finally gotten it working but it took an hour when it could've taken minutes if the whole path was shown somewhere in the debugging steps and/or the documentation was better.