diff --git a/docs/connection.rst b/docs/connection.rst
index 1a5c9288fb05cf289794698fd561952d7f0e1254..71ace16f67efa11c3a9d309812a18a15eba464c4 100644
--- a/docs/connection.rst
+++ b/docs/connection.rst
@@ -12,7 +12,12 @@ backend to be used. Currently this can be:
   - s3
   - azure
   - gs
+  - sd
   - azureSAS
+  - file
+
+If the file protocol scheme is used the rest of the path will be decoded according to url encoding, however
+if OpenVDS fails to recognise the protocol of a url it will treat the url as a local file.
 
 For ``s3`` and ``gs`` the ``resource`` will be the bucket while for ``azure`` the ``resource``
 will be the container. ``azureSAS`` will treat ``resource/sub_path`` as the baseURL
@@ -54,6 +59,13 @@ https://docs.microsoft.com/en-us/azure/storage/common/storage-configure-connecti
   - SignedUrl (Possible values: True, Yes, On, False, No, Off. Default value: False, No, Off)
 The Token is the OAuth2 token.
 
+``sd`` will accept the following keys
+
+  - sdauthorityurl
+  - sdapikey
+  - sdtoken
+  - loglevel
+
 ``azureSAS`` will accept the following keys
 
   - Suffix
@@ -75,7 +87,12 @@ Azure::
 GS::
 
   url = "gs://my_bucket/somepath"
-  connection = "Token=ya29.c.Ko8B3wcAmfbKdqtd9OeEA4pod000u-KFdpFOiXx3S3wQK2WV-DL7oO3dAdCVTGyldJClv-4JIvUtdgFdzeYzzeNv1tG8aGXn_jjZLZkMAThV_0gYGnO2HBUwaqYeNMPlBa9RX4yEPRe4RZiAHk3Btkb29yfLyEJBkx321ntr00lhmAJksqli7igD1xBPlpeK3F0"
+  connection = "Token=some_token"
+
+SD::
+
+  url = "sd://tenent/subprojet/subfolder"
+  connection = "sdauthorityurl=https://some_osdu.instance.com/seistore-svc/api/v3;sdapikey=ABC;sdtoken=some_token"
 
 AzureSAS::
 
diff --git a/examples/SliceServer/sliceserver.py b/examples/SliceServer/sliceserver.py
index 59cc68aff7e5048f84787e8ffe1a88d3c1e41b05..7cc36838130af0ab83d6e17f17c3a8c66cd61ba2 100644
--- a/examples/SliceServer/sliceserver.py
+++ b/examples/SliceServer/sliceserver.py
@@ -14,8 +14,8 @@ from PIL import Image
 VDSs = {}
 
 parser = argparse.ArgumentParser(description="Starts a service that creates png images of the slices of a VDS.")
-parser.add_argument("--url", help="The AWS bucket of the VDSs to start serving")
-parser.add_argument("--connection", help="The Azure Blob Storage connection string.");
+parser.add_argument("--url", help="The url of the VDSs to start serving")
+parser.add_argument("--connection", help="The connection string for the url.")
 parser.add_argument("--key", help="The key of the VDSs to start serving")
 parser.add_argument("--allow-remote", action='store_true', help="Allow remote connections to server.")
 
diff --git a/src/OpenVDS/OpenVDS.cpp b/src/OpenVDS/OpenVDS.cpp
index 21013982e3f143ababf3c504400f043532e68969..3f3575185eb7c327ddd96d1836aae8d16d442eba 100644
--- a/src/OpenVDS/OpenVDS.cpp
+++ b/src/OpenVDS/OpenVDS.cpp
@@ -432,9 +432,7 @@ OpenOptions* CreateOpenOptions(StringWrapper url, StringWrapper connectionString
 
   if (!openOptions)
   {
-    error.code = -1;
-    error.string = fmt::format("Unknown url scheme for {}.", std::string(url.data, url.data + url.size));
-    return nullptr;
+    openOptions.reset(new VDSFileOpenOptions(std::string(url.data, url.size)));
   }
 
   return openOptions.release();
diff --git a/tests/python/VolumeDataAccessor.py b/tests/python/VolumeDataAccessor.py
index 7cabc0f39865c36acbddd2e0413e1e95b559ec26..3421324973807bb2abe788c7d0f4e699cd624100 100644
--- a/tests/python/VolumeDataAccessor.py
+++ b/tests/python/VolumeDataAccessor.py
@@ -8,6 +8,9 @@ if not TEST_URL:
 handle = openvds.open(TEST_URL, TEST_CONNECTION)
 acc = openvds.VolumeDataAccessManager(handle)
 r = acc.requestVolumeSubset((0,0,0),(100,100,100))
+r.waitForCompletion()
 
 accessor = acc.createVolumeData3DReadAccessorR32(openvds.DimensionsND.Dimensions_012)
 v = accessor.getValue((100,100,100))
+
+openvds.close(handle)