Why do Xlsx files open as TxT file?

[AC Question]

Xlsx file opens as TxT file

I have a Galaxy 5. When I open an xlsx document it is a jumbled mess and the file shows as a txt. Anyone ever had this issue before?

 

[B. Diddy]

Re: Xlsx file opens as TxT file

Welcome to Android Central! S5 or Note5? Are you opening the document using Google Sheets, Microsoft Excel, or some other office app?