diff --git a/src/storage/filesystem.js b/src/storage/filesystem.js
index 97b5b116c..23120e7e2 100644
--- a/src/storage/filesystem.js
+++ b/src/storage/filesystem.js
@@ -59,7 +59,7 @@ function getBackupPath(apiConfig) {
 }
 
 // the du call in the function below requires root
-function checkPreconditions(apiConfig, dataLayout, callback) {
+async function checkPreconditions(apiConfig, dataLayout, callback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert(dataLayout instanceof DataLayout, 'dataLayout must be a DataLayout');
     assert.strictEqual(typeof callback, 'function');
@@ -74,21 +74,24 @@ function checkPreconditions(apiConfig, dataLayout, callback) {
 
     debug(`checkPreconditions: ${used} bytes`);
 
-    df.file(getBackupPath(apiConfig)).then(function (result) {
-        // Check filesystem is mounted so we don't write into the actual folder on disk
-        if (apiConfig.provider === PROVIDER_SSHFS || apiConfig.provider === PROVIDER_CIFS || apiConfig.provider === PROVIDER_NFS || apiConfig.provider === PROVIDER_EXT4) {
-            if (result.mountpoint !== apiConfig.mountPoint) return callback(new BoxError(BoxError.FS_ERROR, `${apiConfig.mountPoint} is not mounted`));
-        } else if (apiConfig.provider === PROVIDER_MOUNTPOINT) {
-            if (result.mountpoint === '/') return callback(new BoxError(BoxError.FS_ERROR, `${apiConfig.backupFolder} is not mounted`));
-        }
+    let result;
+    try {
+        result = await df.file(getBackupPath(apiConfig));
+    } catch(error) {
+        return callback(new BoxError(BoxError.FS_ERROR, error));
+    }
 
-        const needed = 0.6 * used + (1024 * 1024 * 1024); // check if there is atleast 1GB left afterwards. aim for 60% because rsync/tgz won't need full 100%
-        if (result.available <= needed) return callback(new BoxError(BoxError.FS_ERROR, `Not enough disk space for backup. Needed: ${prettyBytes(needed)} Available: ${prettyBytes(result.available)}`));
+    // Check filesystem is mounted so we don't write into the actual folder on disk
+    if (apiConfig.provider === PROVIDER_SSHFS || apiConfig.provider === PROVIDER_CIFS || apiConfig.provider === PROVIDER_NFS || apiConfig.provider === PROVIDER_EXT4) {
+        if (result.mountpoint !== apiConfig.mountPoint) return callback(new BoxError(BoxError.FS_ERROR, `${apiConfig.mountPoint} is not mounted`));
+    } else if (apiConfig.provider === PROVIDER_MOUNTPOINT) {
+        if (result.mountpoint === '/') return callback(new BoxError(BoxError.FS_ERROR, `${apiConfig.backupFolder} is not mounted`));
+    }
 
-        callback(null);
-    }).catch(function (error) {
-        callback(new BoxError(BoxError.FS_ERROR, error));
-    });
+    const needed = 0.6 * used + (1024 * 1024 * 1024); // check if there is atleast 1GB left afterwards. aim for 60% because rsync/tgz won't need full 100%
+    if (result.available <= needed) return callback(new BoxError(BoxError.FS_ERROR, `Not enough disk space for backup. Needed: ${prettyBytes(needed)} Available: ${prettyBytes(result.available)}`));
+
+    callback(null);
 }
 
 function hasChownSupportSync(apiConfig) {