@rameshybr 

# List files in a directory
files = dbutils.fs.ls("/mnt/<mount-name>/path/to/directory")

for file in files:
    file_path = file.path
    # Read each file into a DataFrame / if you file format is parquet for example i am taking
    df = spark.read.format("parquet").load(file_path)  
    
    # Perform operations on the DataFrame
    df.show()
    
    df.write.mode("overwrite").parquet("if you want to write to any specific location")