Always name your files appropriately, in a way they will be easily distinguishable at a first glance.
- stick to one naming convention
- don’t put only EAN/SKU number as a filename
- use an underscore to separate file name elements, such as prefixes and suffixes
Example:
Elevit 30_123456.pdpd
Important:
Do not forget to change the file’s name right after it is duplicated. Otherwise, it will be hard to discern them.