Combine mutable excel files with the same Columns in power Query.

Hello abusen333 ,

You can go for "Append Queries as new"

screenshots below:

Select 3 or more tables and all the years data in there:

To further enhance the performance, you can disable the load for the indiviual years tabls and only use the main table(created using appending above)

It can be done by unticking the "Enable Load" option that appears by right clicking the specific table:

Thank You .

Also I found this slouation 

https://blog.crossjoin.co.uk/2018/07/09/power-bi-combine-multiple-excel-worksheets/