PDF Merge

Hi @Emmanuel3828368814mt,

Hope you are doing well. Thanks for writing in!

The files you are trying to combine, are they digitally signed files? If yes, the feature will not work on them as signed files are read-only and do not allow modifications on them to keep the integrity of the files intact. 

If this is not the case, please try moving all the files to the internal storage and then try again.

Alternatively, you can use the online portal: https://adobe.ly/46d5Dln and see if the feature works fine for you.