diff --git a/code/08/backup/foo/bar.gz b/code/08/backup/foo/bar.gz
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diff --git a/code/08/backup/foo/bee.zip b/code/08/backup/foo/bee.zip
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diff --git a/code/08/backup/hello.py b/code/08/backup/hello.py
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diff --git a/code/08/backup/main.go b/code/08/backup/main.go
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diff --git a/code/08/backup/package.json b/code/08/backup/package.json
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diff --git a/code/08/backup/usage.py b/code/08/backup/usage.py
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diff --git a/code/08/main.py b/code/08/main.py
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--- /dev/null
+++ b/code/08/main.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+
+import pathlib
+
+CURRENT_DIR = pathlib.Path(__file__).parent
+ARCHIVE_DIR = CURRENT_DIR.joinpath("archive")
+IGNORES = {
+    ".idea/**",
+    "*.xml",
+    "*.iml",
+    ".vscode/*",
+    ".vscode/**/*",
+    "backup/*",
+    "backup/**/*",
+    __file__,
+}
+
+
+def filter_ignores(files):
+    keep = []
+
+    for file in files:
+        matched = any(
+            [file.match(ignore) or file.name.startswith(".") for ignore in IGNORES]
+        )
+        if not matched:
+            keep.append(file)
+        else:
+            print(f"[WARNING] ignore file: {file}")
+
+    return keep
+
+
+def seek_files(path, recursive=False, ignore=True):
+    files = []
+
+    for file in path.iterdir():
+        if file.is_file():
+            files.append(file)
+        elif recursive and file.is_dir():
+            files.extend(seek_files(file, recursive))
+
+    if ignore:
+        files = filter_ignores(files)
+
+    return files
+
+
+def extract_suffixes(files):
+    suffixes = set()
+    for file in files:
+        suffix = file.suffix
+        if not suffix:
+            continue
+
+        suffix = suffix.replace(".", "")
+        suffixes.add(suffix)
+
+    return suffixes
+
+
+def groupby(files, suffixes):
+    group = {}
+    for file in files:
+        suffix = file.suffix.replace(".", "")
+        if suffix in suffixes:
+            group.setdefault(suffix, []).append(file)
+        else:
+            continue
+
+    return group
+
+
+def classify(files, verbose=False):
+    suffixes = extract_suffixes(files)
+    grouper = groupby(files, suffixes)
+
+    if not grouper.keys():
+        return
+
+    for suffix, fs in grouper.items():
+        directory = ARCHIVE_DIR.joinpath(suffix)
+        directory.mkdir(parents=True, exist_ok=True)
+        if verbose:
+            print(f"[INFO   ] handle .{suffix} files:")
+
+        for file in fs:
+            dest = directory.joinpath(file.name)
+            file.rename(dest)
+            if verbose:
+                print(f"  change {file} -> {dest}")
+
+
+def main():
+
+    path = CURRENT_DIR / "testdata"
+    print(f"Use current directory: {path}")
+
+    files = seek_files(path, recursive=True)
+    classify(files, verbose=True)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/code/08/testdata/foo/bar.gz b/code/08/testdata/foo/bar.gz
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diff --git a/code/08/testdata/foo/bee.zip b/code/08/testdata/foo/bee.zip
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diff --git a/code/08/testdata/hello.py b/code/08/testdata/hello.py
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diff --git a/code/08/testdata/main.go b/code/08/testdata/main.go
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diff --git a/code/08/testdata/package.json b/code/08/testdata/package.json
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diff --git a/code/08/testdata/usage.py b/code/08/testdata/usage.py
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