Good day, user16070.

You can perform a wildcard in search to find the file you've saved on your computer. Here's what you'll need to do:

1. On your computer, click the start menu. 
2. In the search field, type in the file name. 
3. Look for the best match and locate the file.

From there, remember where the file is save. Once done, upload your file. 

You can use this resource for guidance when uploading: Saving You Time with ABA Files (an Electronic Payment File).

For additional reference, check this article: How to enable batch payments or create ABA Files.

If you have any other questions, please let me know by commenting below. I'm here for you. Have a great day!