@amit.saroha: Copy snap would simply put all the values (i.e. A_20052022, B_20052022, C_20052022) into 3 files whereas Router snap as suggested by @Spiro_Taleski would do the work for your use case.
Please don’t forget to use an error view if you’re expecting any other value than A_, B_ and C_ as if you don’t write an expression to handle those values, those values will be lost permanently.
Generally, snapLogic suggests to use an expression as “true” and output it to have all the values in this output (you can decide whether or not to use this output file but always a good practice to have all the values as a backup)