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Challenge 6 - Clean Up Your Digital Mess with Knime

#1 Reads all files from the selected folder and creates one row for each file.
List Files/Folders
#2 Extracts file size, creation date, and last modification date.
Files/Folders Meta Info
#3 Converts the file path into text for further processing.
Path to String
#4 Extracts the file name from the full file path.
String Manipulation
#5 Converts file names to lowercase for consistent categorization.
String Manipulation
#6 Extracts the file extension for file type categorization.
String Manipulation
#7 Converts file size from bytes to megabytes.
Math Formula
#10 Suggests a clean-up action based on file age, size, and category.
Rule Engine
#8 Calculates the number of days since each file was last modified.
Date&Time Difference
#13 Summarizes the number, total size, average age, and largest file by category.
GroupBy
#9 Groups files into categories based on their name and extension.
Rule Engine
#14 Renames the summary columns for a clearer final report.
Column Renamer
#11 Keeps only the relevant columns for the final clean-up overview.
Column Filter
#12 Sorts files by age and size to highlight the highest clean-up priorities.
Sorter
#15 Visualizes the number of files in each category.
Bar Chart
#16 Exports the detailed clean-up overview to an Excel file.
Excel Writer

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To use this workflow in KNIME, download it from the below URL and open it in KNIME:

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Created by: Pesula
Created at: 2026-07-28
On NodePit since: 2026-07-30
Last update: 2026-07-30
Created with KNIME version: v5.11.0

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