diff --git a/crates/pinakes-core/src/config.rs b/crates/pinakes-core/src/config.rs
index 4f30045..5e6cc37 100644
--- a/crates/pinakes-core/src/config.rs
+++ b/crates/pinakes-core/src/config.rs
@@ -651,6 +651,9 @@ pub struct SyncConfig {
     /// Sync log retention in days
     #[serde(default = "default_sync_log_retention")]
     pub sync_log_retention_days: u64,
+    /// Temporary directory for chunked upload storage
+    #[serde(default = "default_temp_upload_dir")]
+    pub temp_upload_dir: PathBuf,
 }
 
 fn default_max_sync_file_size() -> u64 {
@@ -673,6 +676,10 @@ fn default_sync_log_retention() -> u64 {
     90 // 90 days
 }
 
+fn default_temp_upload_dir() -> PathBuf {
+    Config::default_data_dir().join("temp_uploads")
+}
+
 impl Default for SyncConfig {
     fn default() -> Self {
         Self {
@@ -683,6 +690,7 @@ impl Default for SyncConfig {
             upload_timeout_hours: default_upload_timeout(),
             max_concurrent_uploads: default_max_concurrent_uploads(),
             sync_log_retention_days: default_sync_log_retention(),
+            temp_upload_dir: default_temp_upload_dir(),
         }
     }
 }