diff --git a/frontend/src/RootFolder/RootFolderRow.js b/frontend/src/RootFolder/RootFolderRow.js
index ffa836dc2..155419bf1 100644
--- a/frontend/src/RootFolder/RootFolderRow.js
+++ b/frontend/src/RootFolder/RootFolderRow.js
@@ -13,13 +13,13 @@ function RootFolderRow(props) {
   const {
     id,
     path,
+    accessible,
     freeSpace,
     unmappedFolders,
     onDeletePress
   } = props;
 
-  const unmappedFoldersCount = unmappedFolders.length || '-';
-  const isUnavailable = freeSpace == null;
+  const isUnavailable = !accessible;
 
   return (
     <TableRow>
@@ -47,11 +47,11 @@ function RootFolderRow(props) {
       </TableRowCell>
 
       <TableRowCell className={styles.freeSpace}>
-        {freeSpace ? formatBytes(freeSpace) : '-'}
+        {(isUnavailable || isNaN(freeSpace)) ? '-' : formatBytes(freeSpace)}
       </TableRowCell>
 
       <TableRowCell className={styles.unmappedFolders}>
-        {unmappedFoldersCount}
+        {isUnavailable ? '-' : unmappedFolders.length}
       </TableRowCell>
 
       <TableRowCell className={styles.actions}>
@@ -68,6 +68,7 @@ function RootFolderRow(props) {
 RootFolderRow.propTypes = {
   id: PropTypes.number.isRequired,
   path: PropTypes.string.isRequired,
+  accessible: PropTypes.bool.isRequired,
   freeSpace: PropTypes.number,
   unmappedFolders: PropTypes.arrayOf(PropTypes.object).isRequired,
   onDeletePress: PropTypes.func.isRequired
diff --git a/frontend/src/RootFolder/RootFolders.js b/frontend/src/RootFolder/RootFolders.js
index 57598dbb9..a07209ecc 100644
--- a/frontend/src/RootFolder/RootFolders.js
+++ b/frontend/src/RootFolder/RootFolders.js
@@ -59,6 +59,7 @@ function RootFolders(props) {
                 key={rootFolder.id}
                 id={rootFolder.id}
                 path={rootFolder.path}
+                accessible={rootFolder.accessible}
                 freeSpace={rootFolder.freeSpace}
                 unmappedFolders={rootFolder.unmappedFolders}
               />
diff --git a/src/NzbDrone.Core/Datastore/TableMapping.cs b/src/NzbDrone.Core/Datastore/TableMapping.cs
index d71582831..f3c5da56e 100644
--- a/src/NzbDrone.Core/Datastore/TableMapping.cs
+++ b/src/NzbDrone.Core/Datastore/TableMapping.cs
@@ -51,6 +51,7 @@ namespace NzbDrone.Core.Datastore
             Mapper.Entity<Config>().RegisterModel("Config");
 
             Mapper.Entity<RootFolder>().RegisterModel("RootFolders")
+                  .Ignore(r => r.Accessible)
                   .Ignore(r => r.FreeSpace)
                   .Ignore(r => r.TotalSpace);
 
diff --git a/src/NzbDrone.Core/RootFolders/RootFolder.cs b/src/NzbDrone.Core/RootFolders/RootFolder.cs
index f32716b52..0ae3b0155 100644
--- a/src/NzbDrone.Core/RootFolders/RootFolder.cs
+++ b/src/NzbDrone.Core/RootFolders/RootFolder.cs
@@ -8,6 +8,7 @@ namespace NzbDrone.Core.RootFolders
     {
         public string Path { get; set; }
 
+        public bool Accessible { get; set; }
         public long? FreeSpace { get; set; }
         public long? TotalSpace { get; set; }
 
diff --git a/src/NzbDrone.Core/RootFolders/RootFolderService.cs b/src/NzbDrone.Core/RootFolders/RootFolderService.cs
index 88bcb409f..e24ee2e84 100644
--- a/src/NzbDrone.Core/RootFolders/RootFolderService.cs
+++ b/src/NzbDrone.Core/RootFolders/RootFolderService.cs
@@ -183,12 +183,12 @@ namespace NzbDrone.Core.RootFolders
             {
                 if (_diskProvider.FolderExists(rootFolder.Path))
                 {
+                    rootFolder.Accessible = true;
                     rootFolder.FreeSpace = _diskProvider.GetAvailableSpace(rootFolder.Path);
                     rootFolder.TotalSpace = _diskProvider.GetTotalSize(rootFolder.Path);
                     rootFolder.UnmappedFolders = GetUnmappedFolders(rootFolder.Path);
                 }
-            })
-                .Wait(5000);
+            }).Wait(5000);
         }
     }
 }
diff --git a/src/Sonarr.Api.V3/RootFolders/RootFolderResource.cs b/src/Sonarr.Api.V3/RootFolders/RootFolderResource.cs
index e85cdc99d..babae02cb 100644
--- a/src/Sonarr.Api.V3/RootFolders/RootFolderResource.cs
+++ b/src/Sonarr.Api.V3/RootFolders/RootFolderResource.cs
@@ -9,6 +9,7 @@ namespace Sonarr.Api.V3.RootFolders
     public class RootFolderResource : RestResource
     {
         public string Path { get; set; }
+        public bool Accessible { get; set; }
         public long? FreeSpace { get; set; }
 
         public List<UnmappedFolder> UnmappedFolders { get; set; }
@@ -25,6 +26,7 @@ namespace Sonarr.Api.V3.RootFolders
                 Id = model.Id,
 
                 Path = model.Path.GetCleanPath(),
+                Accessible = model.Accessible,
                 FreeSpace = model.FreeSpace,
                 UnmappedFolders = model.UnmappedFolders
             };
@@ -39,6 +41,7 @@ namespace Sonarr.Api.V3.RootFolders
                 Id = resource.Id,
 
                 Path = resource.Path
+                //Accessible
                 //FreeSpace
                 //UnmappedFolders
             };