diff --git a/fs/Exfat.cpp b/fs/Exfat.cpp
new file mode 100644
index 0000000..5c15075
--- /dev/null
+++ b/fs/Exfat.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sys/mount.h>
+
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+
+#include <logwrap/logwrap.h>
+
+#include "Exfat.h"
+#include "Utils.h"
+
+using android::base::StringPrintf;
+
+namespace android {
+namespace vold {
+namespace exfat {
+
+static const char* kMkfsPath = "/system/bin/mkfs.exfat";
+static const char* kFsckPath = "/system/bin/fsck.exfat";
+
+bool IsSupported() {
+    return access(kMkfsPath, X_OK) == 0 && access(kFsckPath, X_OK) == 0 &&
+           IsFilesystemSupported("exfat");
+}
+
+status_t Check(const std::string& source) {
+    std::vector<std::string> cmd;
+    cmd.push_back(kFsckPath);
+    cmd.push_back(source);
+
+    int rc = ForkExecvp(cmd, sFsckUntrustedContext);
+    if (rc == 0) {
+        LOG(INFO) << "Check OK";
+        return 0;
+    } else {
+        LOG(ERROR) << "Check failed (code " << rc << ")";
+        errno = EIO;
+        return -1;
+    }
+}
+
+status_t Mount(const std::string& source, const std::string& target, int ownerUid, int ownerGid,
+               int permMask) {
+    int mountFlags = MS_NODEV | MS_NOSUID | MS_DIRSYNC | MS_NOATIME | MS_NOEXEC;
+    auto mountData = android::base::StringPrintf("uid=%d,gid=%d,fmask=%o,dmask=%o", ownerUid,
+                                                 ownerGid, permMask, permMask);
+
+    if (mount(source.c_str(), target.c_str(), "exfat", mountFlags, mountData.c_str()) == 0) {
+        return 0;
+    }
+
+    PLOG(ERROR) << "Mount failed; attempting read-only";
+    mountFlags |= MS_RDONLY;
+    if (mount(source.c_str(), target.c_str(), "exfat", mountFlags, mountData.c_str()) == 0) {
+        return 0;
+    }
+
+    return -1;
+}
+
+status_t Format(const std::string& source) {
+    std::vector<std::string> cmd;
+    cmd.push_back(kMkfsPath);
+    cmd.push_back("-n");
+    cmd.push_back("android");
+    cmd.push_back(source);
+
+    int rc = ForkExecvp(cmd);
+    if (rc == 0) {
+        LOG(INFO) << "Format OK";
+        return 0;
+    } else {
+        LOG(ERROR) << "Format failed (code " << rc << ")";
+        errno = EIO;
+        return -1;
+    }
+    return 0;
+}
+
+}  // namespace exfat
+}  // namespace vold
+}  // namespace android