diff --git a/technical.md b/technical.md
index 5b137b4..aa70c04 100644
--- a/technical.md
+++ b/technical.md
@@ -100,3 +100,13 @@ A `Kind 30078` is also created, which contains a link to the blossom server, and
 NIP-78 requires a d-tag to provide some application context.  To avoid revealing metadata, the d tag will be the first 32 chars of the encrypted result of the string "938" plus the users npub.  
 
 
+## File Types
+
+All data is stored either on the relay(s) or on the blossome server(s).  File types include the following:
+
+
+* App Metadata Event - the kind 30078 (NIP-78) that lives on the relay
+* App Data Object - the encrypted JSON file that lives on the blossom server
+* Sigit Data Object - the encrypted meta.json file that lives on blossom
+* Sigit Files Zip - the encrypted zip file with all the unchanged files, that lives on blossom
+* Sigit Notification Event - the NIP-17 nostr event that lives on the relay