復元方法を知りたいです。

Hi @しーちゃん34556509m4hv,

Hope you are doing well. Sorry for your experience with Acrobat Reader Mobile.

Would you mind logging on to https://acrobat.adobe.com/link/documents/ and checking if the files are available there?

If yes, try logging in to the app with the same email address; the files should also appear there. 

If this is not the case, please share a screen recording of the event for a better understanding and assistance.

Look forward to hearing from you.

-Souvik