The following cross-platform Python script allows you to search for the biggest file within a directory and all its subfolders (the search is recursive). The directory path must be passed as the first argument when invoking the script. Additionally, a second argument indicating a file extension can optionally be passed to limit the search.
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import os
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import pathlib
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import sys
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target_path = pathlib.Path(sys.argv[1])
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try:
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target_ext = sys.argv[2]
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except IndexError:
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target_ext = None
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current_max_size = 0
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print("Searching...")
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# Recursively iterate over the target directory tree.
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for dirpath, dirnames, filenames in os.walk(target_path):
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for filename in filenames:
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# Ignore files that lack the specified target extension, if any.
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if (target_ext is not None and
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not filename.lower().endswith(target_ext.lower())):
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continue
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p = pathlib.Path(dirpath, filename)
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if (size := p.stat().st_size) > current_max_size:
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# Update the variables that record the biggest file
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# found up to now.
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current_max_size = size
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biggest_file = p
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print("Biggest file found up to now:", filename)
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print(f"Final biggest file: {biggest_file.absolute()} "
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f"({current_max_size // 1024} KB)")
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For example, to find the biggest file inside C:\Python310 and its subfolders, run in the terminal:
py find_biggest_file.py C:\Python310
To find the largest Python (.py) file:
py find_file.py C:\Python310 .py
On macOS and Linux distributions, use python or python3 instead of py.