diff --git a/nfs/CHANGELOG.md b/nfs/CHANGELOG.md
index e1ac2d3..b8384a6 100644
--- a/nfs/CHANGELOG.md
+++ b/nfs/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.0.13 - 2026-03-31
+
+- feat: add per-share sync option (default true) to fix I/O errors on large file transfers
+
 ## 1.0.12 - 2026-03-31
 
 - fix: add -s flag to unfsd for stable file handles, fixes EIO errors during rsync
diff --git a/nfs/config.json b/nfs/config.json
index 18d09dc..6a888fd 100644
--- a/nfs/config.json
+++ b/nfs/config.json
@@ -1,6 +1,6 @@
 {
   "name": "NFS Server",
-  "version": "1.0.12",
+  "version": "1.0.13",
   "slug": "nfs_server",
   "description": "Expose Home Assistant media folder via NFS.",
   "arch": [
@@ -27,7 +27,8 @@
         "folder": "media",
         "allowed_network": "192.168.1.0/24",
         "read_only": false,
-        "root_squash": true
+        "root_squash": true,
+        "sync": true
       }
     ]
   },
@@ -37,7 +38,8 @@
         "folder": "str",
         "allowed_network": "str",
         "read_only": "bool",
-        "root_squash": "bool"
+        "root_squash": "bool",
+        "sync": "bool"
       }
     ]
   },
diff --git a/nfs/run.sh b/nfs/run.sh
index ce6c268..1000191 100644
--- a/nfs/run.sh
+++ b/nfs/run.sh
@@ -18,6 +18,7 @@ else
         NETWORK=$(jq -r ".shares[${i}].allowed_network" "${CONFIG}")
         READ_ONLY=$(jq -r ".shares[${i}].read_only" "${CONFIG}")
         ROOT_SQUASH=$(jq -r ".shares[${i}].root_squash" "${CONFIG}")
+        SYNC=$(jq -r ".shares[${i}].sync" "${CONFIG}")
         MOUNT_PATH="/${FOLDER}"
 
         if [ "${READ_ONLY}" = "true" ]; then
@@ -31,6 +32,11 @@ else
         else
             OPTIONS="${OPTIONS},no_root_squash"
         fi
+
+        if [ "${SYNC}" = "true" ]; then
+            OPTIONS="${OPTIONS},sync"
+        fi
+
         OPTIONS="${OPTIONS},insecure"
 
         bashio::log.info "Exporting ${MOUNT_PATH} to ${NETWORK} (${OPTIONS})..."