diff --git a/app.R b/app.R
index eba0f2d..588e14e 100644
--- a/app.R
+++ b/app.R
@@ -643,7 +643,10 @@ server <- function(input, output, session) {
     zipFile <- zipr(paste0("tmp/MESO-", format(Sys.time(), "%m%d_%H%M"), ".zip"), c("tmp/layer1.png", "tmp/layer2.png", "tmp/layer3.png", "tmp/dataset.xlsx"))
 
     print(paste("zip file complete", zipFile))
-
+    file.remove("tmp/layer1.png")
+    file.remove("tmp/layer2.png")
+    file.remove("tmp/layer3.png")
+    file.remove("tmp/dataset.xlsx")
     return(zipFile)
   }
 
@@ -659,8 +662,17 @@ server <- function(input, output, session) {
   output$download <- downloadHandler(
     filename = paste0("MESO-", format(Sys.time(), "%m%d_%H%M"), ".zip"),
     content = function(file) {
+      showModal(
+        modalDialog(
+          fluidRow(
+            column(width = 12) %>% withSpinner(type = 5, proxy.height = "200px")
+          ), 
+          footer=div()
+        )
+      )
       fName <- export(modelList[[.selections$model]])
       file.copy(fName, file)
+      removeModal()
     },
     contentType = "application/zip"
   )