diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/nsclient/NSClientAddAckWorker.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/nsclient/NSClientAddAckWorker.kt
index f41e57684f..1bfbd3e4e2 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/nsclient/NSClientAddAckWorker.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/nsclient/NSClientAddAckWorker.kt
@@ -1,10 +1,12 @@
 package info.nightscout.androidaps.plugins.general.nsclient
 
 import android.content.Context
+import android.os.SystemClock
 import androidx.work.Worker
 import androidx.work.WorkerParameters
 import androidx.work.workDataOf
 import dagger.android.HasAndroidInjector
+import info.nightscout.androidaps.R
 import info.nightscout.androidaps.database.AppRepository
 import info.nightscout.androidaps.database.entities.DeviceStatus
 import info.nightscout.androidaps.database.transactions.*
@@ -17,6 +19,7 @@ import info.nightscout.androidaps.plugins.general.nsclient.acks.NSAddAck
 import info.nightscout.androidaps.plugins.general.nsclient.events.EventNSClientNewLog
 import info.nightscout.androidaps.receivers.DataWorker
 import info.nightscout.androidaps.utils.rx.AapsSchedulers
+import info.nightscout.androidaps.utils.sharedPreferences.SP
 import javax.inject.Inject
 
 class NSClientAddAckWorker(
@@ -30,6 +33,7 @@ class NSClientAddAckWorker(
     @Inject lateinit var rxBus: RxBus
     @Inject lateinit var dataSyncSelector: DataSyncSelector
     @Inject lateinit var aapsSchedulers: AapsSchedulers
+    @Inject lateinit var sp: SP
 
     override fun doWork(): Result {
         var ret = Result.success()
@@ -37,6 +41,8 @@ class NSClientAddAckWorker(
         val ack = dataWorker.pickupObject(inputData.getLong(DataWorker.STORE_KEY, -1)) as NSAddAck?
             ?: return Result.failure(workDataOf("Error" to "missing input data"))
 
+        if (sp.getBoolean(R.string.key_ns_sync_slow, false)) SystemClock.sleep(1000)
+
         when (ack.originalObject) {
             is PairTemporaryTarget       -> {
                 val pair = ack.originalObject
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2fe7985621..48799e24d6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -54,6 +54,7 @@
     <string name="key_ns_offline_event_last_synced_id" translatable="false">ns_offline_event_last_synced_id</string>
     <string name="key_ns_profile_store_last_synced_timestamp" translatable="false">ns_profile_store_last_synced_timestamp</string>
     <string name="key_local_profile_last_change" translatable="false">local_profile_last_change</string>
+    <string name="key_ns_sync_slow" translatable="false">ns_sync_slow</string>
 
     <string name="treatmentssafety_title">Treatments safety</string>
     <string name="treatmentssafety_maxbolus_title">Max allowed bolus [U]</string>
@@ -1128,5 +1129,6 @@
     <string name="invalid_profile_not_accepted">Invalid profile %1$s not accepted from NS</string>
     <string name="view">View</string>
     <string name="errors">Errors</string>
+    <string name="ns_sync_slow">Slow down uploads</string>
 
 </resources>
diff --git a/app/src/main/res/xml/pref_nsclientinternal.xml b/app/src/main/res/xml/pref_nsclientinternal.xml
index c9dbe2d1e5..e2e14efa99 100644
--- a/app/src/main/res/xml/pref_nsclientinternal.xml
+++ b/app/src/main/res/xml/pref_nsclientinternal.xml
@@ -156,7 +156,7 @@
         </androidx.preference.PreferenceScreen>
 
         <androidx.preference.PreferenceScreen
-            android:key="absorption_nsclient_advanced"
+            android:key="nsclient_advanced"
             android:title="@string/advancedsettings_title">
 
             <SwitchPreference
@@ -189,6 +189,11 @@
                 android:key="@string/key_ns_sync_use_absolute"
                 android:title="@string/ns_sync_use_absolute_title" />
 
+            <SwitchPreference
+                android:defaultValue="false"
+                android:key="@string/key_ns_sync_slow"
+                android:title="@string/ns_sync_slow" />
+
         </androidx.preference.PreferenceScreen>
 
     </PreferenceCategory>