diff --git a/hubspot/files/api_client.py b/hubspot/files/api_client.py
index 1be493c8..06be5252 100644
--- a/hubspot/files/api_client.py
+++ b/hubspot/files/api_client.py
@@ -478,11 +478,19 @@ def files_parameters(self, files=None):
                     continue
                 file_names = v if type(v) is list else [v]
                 for n in file_names:
-                    with open(n, "rb") as f:
-                        filename = os.path.basename(f.name)
-                        filedata = f.read()
-                        mimetype = mimetypes.guess_type(filename)[0] or "application/octet-stream"
-                        params.append(tuple([k, tuple([filename, filedata, mimetype])]))
+                    if hasattr(n, "read"):
+                        filedata = n.read()
+                        raw_name = getattr(n, "name", None) or "upload"
+                        filename = os.path.basename(str(raw_name)) or "upload"
+                    elif isinstance(n, (bytes, bytearray)):
+                        filedata = bytes(n)
+                        filename = "upload"
+                    else:
+                        with open(n, "rb") as f:
+                            filename = os.path.basename(f.name)
+                            filedata = f.read()
+                    mimetype = mimetypes.guess_type(filename)[0] or "application/octet-stream"
+                    params.append(tuple([k, tuple([filename, filedata, mimetype])]))
 
         return params
 
diff --git a/tests/spec/files/test_files_parameters.py b/tests/spec/files/test_files_parameters.py
new file mode 100644
index 00000000..37b889a3
--- /dev/null
+++ b/tests/spec/files/test_files_parameters.py
@@ -0,0 +1,26 @@
+import os
+import tempfile
+from io import BytesIO
+
+from hubspot.files.api_client import ApiClient
+
+
+def test_files_parameters_accepts_path_bytes_and_file_object():
+    client = ApiClient()
+    with tempfile.NamedTemporaryFile(suffix=".txt", delete=False) as handle:
+        handle.write(b"from disk")
+        path = handle.name
+    try:
+        from_path = client.files_parameters({"file": path})
+        assert from_path[0][1][1] == b"from disk"
+        assert from_path[0][1][0] == os.path.basename(path)
+    finally:
+        os.remove(path)
+
+    from_bytes = client.files_parameters({"file": b"from memory"})
+    assert from_bytes[0][1][1] == b"from memory"
+
+    named = BytesIO(b"from buffer")
+    named.name = "notes.txt"
+    from_buffer = client.files_parameters({"file": named})
+    assert from_buffer[0][1] == ("notes.txt", b"from buffer", "text/plain")