Hi @laurorctb40
Then you need to put another few steps where It can consider .doc
1) You get the list of docs from the Get Files from Folder action
2) Use Create New List action
3) Use For Each activity next and select the Files variable where the output is stored from Get Files From Folder action
4) Inside the use If action and select the currentItem Ends with .doc
5) Inside the IF action use Add Item to List where you can Add item CurrentItem and select List as List

This way you can filter files which ends with .doc
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Thanks,
Srini