In brief
glob finds paths matching patterns such as *.csv, but does not guarantee their order. Sort the results explicitly for an ordered import.
Useful to know
glob finds paths matching patterns such as *.csv, but does not guarantee their order. Sort the results explicitly for an ordered import. [1]
Recursive searches can cover a large area. Restricting the starting directory and expected names makes review easier. A matching name neither authenticates the contents nor means the file should automatically be processed.
Sources
For further detail and to check the information: