Rename Every File Inside a Folder with a Name Having 10 Digits

[JMichaelTX]

Here's a possible untested solution.
It will use all numbers for the file name, sequentially numbering them starting with "0000000001".

1. Set a Counter Variable "Local__Count" to 0.

2. Use For Each action with a Folder Contents collection.
   Name the For Each loop variable "Local__FilePath"
   with these Actions in it:

   1. Use the Get File Attribute action to get the file extension into Variable "Local__FileExt"
   2. Increment counter Variable Local__Count by 1, and use the format option to pad with zeros:
      • 
        (enter 10 zeros into the format field)
   3. Rename using Move or Rename Action
      • 
        %Local__Count%.%Local__FileExt%

That should do it.
Of course, you should carefully test in a TEST folder with only a few files to make sure it does what you want.