diff --git a/doc/FAQ.md b/doc/FAQ.md
index 99eabba..11f6109 100644
--- a/doc/FAQ.md
+++ b/doc/FAQ.md
@@ -26,6 +26,9 @@
 - Rename wallets
 - Archive (=Backup and delete)
 
+## Backup / Archive says "Backup/Archive failed"
+You need to have synced at least once for these functions to work as the cache file must have been created.
+
 ## I cannot select and copy the mnemonic seed
 Copying anything to the clipboard on Android exposes it to any other App running. So this
 is a security measure to keep your seed safe(r).