diff --git a/openflexure_microscope/api/default_extensions/autostorage.py b/openflexure_microscope/api/default_extensions/autostorage.py
index 1046e895..e2f43fcc 100644
--- a/openflexure_microscope/api/default_extensions/autostorage.py
+++ b/openflexure_microscope/api/default_extensions/autostorage.py
@@ -1,12 +1,69 @@
 from labthings.server.extensions import BaseExtension
-from openflexure_microscope.paths import settings_file_path
+from openflexure_microscope.paths import settings_file_path, check_rw
 from openflexure_microscope.config import OpenflexureSettingsFile
+from openflexure_microscope.camera.base import BASE_CAPTURE_PATH
 
 import logging
+import os
+import psutil
+
+from sys import platform
+
 
 AS_SETTINGS_PATH = settings_file_path("autostorage_settings.json")
 
 
+def get_partitions():
+    return [disk.mountpoint for disk in psutil.disk_partitions() if "rw" in disk.opts]
+
+
+def get_permissive_partitions():
+    return [partition for partition in get_partitions() if check_rw(partition)]
+
+
+def get_permissive_locations():
+    return [
+        (partition, os.path.join(partition, "openflexure", "data", "micrographs"))
+        for partition in get_permissive_partitions()
+    ]
+
+
+def get_current_location(camera):
+    return camera.paths.get("default")
+
+
+def get_default_location():
+    return BASE_CAPTURE_PATH
+
+
+def get_all_locations(camera):
+    locations = {"System": get_current_location(camera)}
+    # If default is not already listed (e.g. if it's currently set)
+    if get_default_location() not in locations.values():
+        locations["Default"] = get_default_location()
+
+    for ppartition, plocation in get_permissive_locations():
+        pdrive = os.path.splitdrive(plocation)[0]
+        if not (
+            pdrive  # If path actually has a drive (basically just Windows?)
+            and any(  # And shares a common drive with an existing location
+                [
+                    pdrive == os.path.splitdrive(location)[0]
+                    for location in locations.values()
+                ]
+            )
+        ):
+            locations[ppartition] = plocation
+
+    # Strip out Nones
+    return {k: v for k, v in locations.items() if v}
+
+
+class CaptureStorageLocation:
+    def __init__(self, mountpoint):
+        pass
+
+
 class AutostorageExtension(BaseExtension):
     def __init__(self):
         BaseExtension.__init__(
@@ -33,5 +90,13 @@ class AutostorageExtension(BaseExtension):
             self.camera = microscope_obj.camera
             logging.debug(f"Autostorage extension bound to camera {self.camera}")
 
+            logging.debug(self.get_locations())
+
+    def get_locations(self):
+        if self.camera:
+            return get_all_locations(self.camera)
+        else:
+            return []
+
 
 autostorage_extension_v2 = AutostorageExtension()