diff --git a/Tactility/Include/Tactility/Paths.h b/Tactility/Include/Tactility/Paths.h
index 1b24abf3..005bd6e5 100644
--- a/Tactility/Include/Tactility/Paths.h
+++ b/Tactility/Include/Tactility/Paths.h
@@ -1,8 +1,21 @@
-//
-// Created by ken on 20/09/2025.
-//
+#pragma once
 
-#ifndef TACTILITY_PATHS_H
-#define TACTILITY_PATHS_H
+#include <string>
 
-#endif //TACTILITY_PATHS_H
+namespace tt {
+
+bool findFirstMountedSdCardPath(std::string& path);
+
+std::string getSystemRootPath();
+
+std::string getTempPath();
+
+std::string getAppInstallPath();
+
+std::string getAppInstallPath(const std::string& appId);
+
+std::string getUserPath();
+
+std::string getAppUserPath(const std::string& appId);
+
+}
diff --git a/Tactility/Include/Tactility/app/App.h b/Tactility/Include/Tactility/app/App.h
index cf98611b..d38ad473 100644
--- a/Tactility/Include/Tactility/app/App.h
+++ b/Tactility/Include/Tactility/app/App.h
@@ -94,9 +94,7 @@ std::shared_ptr<AppContext> _Nullable getCurrentAppContext();
 /** @return the currently running app (it is only ever null before the splash screen is shown) */
 std::shared_ptr<App> _Nullable getCurrentApp();
 
-std::string getTempPath();
-
-std::string getInstallPath();
+bool isValidId(const std::string& id);
 
 bool install(const std::string& path);
 
diff --git a/Tactility/Include/Tactility/app/AppManifest.h b/Tactility/Include/Tactility/app/AppManifest.h
index 63f74d5f..17892dba 100644
--- a/Tactility/Include/Tactility/app/AppManifest.h
+++ b/Tactility/Include/Tactility/app/AppManifest.h
@@ -72,6 +72,15 @@ struct AppManifest {
     /** Optional icon. */
     std::string icon = {};
 
+    /** Optional description */
+    std::string description = {};
+
+    /** Optional author name */
+    std::string authorName = {};
+
+    /** Optional author website */
+    std::string authorWebsite = {};
+
     /** App category helps with listing apps in Launcher, app list or settings apps. */
     Category category = Category::User;
 
diff --git a/Tactility/Source/Paths.cpp b/Tactility/Source/Paths.cpp
index 376ce540..de7aee0a 100644
--- a/Tactility/Source/Paths.cpp
+++ b/Tactility/Source/Paths.cpp
@@ -1,3 +1,54 @@
-//
-// Created by ken on 20/09/2025.
-//
+#include <Tactility/Paths.h>
+
+#include <Tactility/app/App.h>
+#include <Tactility/MountPoints.h>
+#include <Tactility/hal/sdcard/SdCardDevice.h>
+
+namespace tt {
+
+bool findFirstMountedSdCardPath(std::string& path) {
+    // const auto sdcards = hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard);
+    bool is_set = false;
+    hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard, [&is_set, &path](const auto& device) {
+        if (device->isMounted()) {
+            path = device->getMountPath();
+            is_set = true;
+            return false; // stop iterating
+        } else {
+            return true;
+        }
+    });
+    return is_set;
+}
+
+std::string getSystemRootPath() {
+    std::string root_path;
+    if (!findFirstMountedSdCardPath(root_path)) {
+        root_path = file::MOUNT_POINT_DATA;
+    }
+    return root_path;
+}
+
+std::string getTempPath() {
+    return getSystemRootPath() + "/tmp";
+}
+
+std::string getAppInstallPath() {
+    return getSystemRootPath() + "/app";
+}
+
+std::string getUserPath() {
+    return getSystemRootPath() + "/user";
+}
+
+std::string getAppInstallPath(const std::string& appId) {
+    assert(app::isValidId(appId));
+    return std::format("{}/{}", getAppInstallPath(), appId);
+}
+
+std::string getAppUserPath(const std::string& appId) {
+    assert(app::isValidId(appId));
+    return std::format("{}/app/{}", getUserPath(), appId);
+}
+
+}
\ No newline at end of file
diff --git a/Tactility/Source/Tactility.cpp b/Tactility/Source/Tactility.cpp
index f56decf7..9c7dd4be 100644
--- a/Tactility/Source/Tactility.cpp
+++ b/Tactility/Source/Tactility.cpp
@@ -194,7 +194,7 @@ static void registerInstalledApps(const std::string& path) {
 
 static void registerInstalledAppsFromSdCard(const std::shared_ptr<hal::sdcard::SdCardDevice>& sdcard) {
     auto sdcard_root_path = sdcard->getMountPath();
-    auto app_path = std::format("{}/apps", sdcard_root_path);
+    auto app_path = std::format("{}/app", sdcard_root_path);
     sdcard->getLock()->lock();
     if (file::isDirectory(app_path)) {
         registerInstalledApps(app_path);
diff --git a/Tactility/Source/app/App.cpp b/Tactility/Source/app/App.cpp
index 806b2be5..0d929bf2 100644
--- a/Tactility/Source/app/App.cpp
+++ b/Tactility/Source/app/App.cpp
@@ -1,3 +1,4 @@
+#include <regex>
 #include <Tactility/app/App.h>
 #include <Tactility/service/loader/Loader.h>
 
@@ -19,4 +20,9 @@ std::shared_ptr<App> _Nullable getCurrentApp() {
     return service::loader::getCurrentApp();
 }
 
+bool isValidId(const std::string& id) {
+    const auto pattern = std::regex("^[a-zA-Z0-9_-\\.]+$");
+    return std::regex_match(id, pattern);
+}
+
 }
diff --git a/Tactility/Source/app/AppInstall.cpp b/Tactility/Source/app/AppInstall.cpp
index 61ee3f33..db660843 100644
--- a/Tactility/Source/app/AppInstall.cpp
+++ b/Tactility/Source/app/AppInstall.cpp
@@ -1,3 +1,5 @@
+#include "Tactility/Paths.h"
+
 #include <Tactility/app/App.h>
 
 #include <Tactility/MountPoints.h>
@@ -103,44 +105,13 @@ static bool untar(const std::string& tarPath, const std::string& destinationPath
     return success;
 }
 
-bool findFirstMountedSdCardPath(std::string& path) {
-    // const auto sdcards = hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard);
-    bool is_set = false;
-    hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard, [&is_set, &path](const auto& device) {
-        if (device->isMounted()) {
-            path = device->getMountPath();
-            is_set = true;
-            return false; // stop iterating
-        } else {
-            return true;
-        }
-    });
-    return is_set;
-}
-
-std::string getTempPath() {
-    std::string root_path;
-    if (!findFirstMountedSdCardPath(root_path)) {
-        root_path = file::MOUNT_POINT_DATA;
-    }
-    return root_path + "/tmp";
-}
-
-std::string getInstallPath() {
-    std::string root_path;
-    if (!findFirstMountedSdCardPath(root_path)) {
-        root_path = file::MOUNT_POINT_DATA;
-    }
-    return root_path + "/apps";
-}
-
 bool install(const std::string& path) {
     // TODO: Make better: lock for each path type properly (source vs target)
 
     // We lock and unlock frequently because SPI SD card devices share
     // the lock with the display. We don't want to lock the display for very long.
 
-    auto app_parent_path = getInstallPath();
+    auto app_parent_path = getAppInstallPath();
     TT_LOG_I(TAG, "Installing app %s to %s", path.c_str(), app_parent_path.c_str());
 
     auto lock = file::getLock(app_parent_path)->asScopedLock();
@@ -225,8 +196,8 @@ bool install(const std::string& path) {
 
 bool uninstall(const std::string& appId) {
     TT_LOG_I(TAG, "Uninstalling app %s", appId.c_str());
-    auto app_path = getInstallPath() + "/" + appId;
-    return file::withLock<bool>(app_path, [&app_path, &appId]() {
+    auto app_path = getAppInstallPath(appId);
+    return file::withLock<bool>(app_path, [&app_path, &appId] {
         if (!file::isDirectory(app_path)) {
             TT_LOG_E(TAG, "App %s not found at ", app_path.c_str());
             return false;
diff --git a/Tactility/Source/hal/sdcard/SdCardMounting.cpp b/Tactility/Source/hal/sdcard/SdCardMounting.cpp
index 1a3079e0..e66b4a1e 100644
--- a/Tactility/Source/hal/sdcard/SdCardMounting.cpp
+++ b/Tactility/Source/hal/sdcard/SdCardMounting.cpp
@@ -15,24 +15,18 @@ static void mount(const std::shared_ptr<SdCardDevice>& sdcard, const std::string
    });
 }
 
+static std::string getMountPath(int index, int count) {
+    return (count == 1) ? TT_SDCARD_MOUNT_POINT : std::format("{}{}", TT_SDCARD_MOUNT_POINT, index);
+}
+
 void mountAll() {
     auto sdcards = hal::findDevices<SdCardDevice>(Device::Type::SdCard);
-    if (!sdcards.empty()) {
-        if (sdcards.size() == 1) {
-            // Fixed mount path name
-            auto sdcard = sdcards[0];
-            if (!sdcard->isMounted()) {
-                mount(sdcard, TT_SDCARD_MOUNT_POINT);
-            }
-        } else {
-            // Numbered mount path name
-            for (int i = 0; i < sdcards.size(); i++) {
-                auto sdcard = sdcards[i];
-                if (!sdcard->isMounted()) {
-                    std::string mount_path = TT_SDCARD_MOUNT_POINT + std::to_string(i);
-                    mount(sdcard, mount_path);
-                }
-            }
+    // Numbered mount path name
+    for (int i = 0; i < sdcards.size(); i++) {
+        auto sdcard = sdcards[i];
+        if (!sdcard->isMounted() && sdcard->getMountBehaviour() == SdCardDevice::MountBehaviour::AtBoot) {
+            std::string mount_path = getMountPath(i, sdcards.size());
+            mount(sdcard, mount_path);
         }
     }
 }
diff --git a/Tactility/Source/service/development/DevelopmentService.cpp b/Tactility/Source/service/development/DevelopmentService.cpp
index 889ad15f..ae1a22a8 100644
--- a/Tactility/Source/service/development/DevelopmentService.cpp
+++ b/Tactility/Source/service/development/DevelopmentService.cpp
@@ -4,10 +4,10 @@
 
 #include <Tactility/app/App.h>
 #include <Tactility/app/AppRegistration.h>
-#include <Tactility/app/ElfApp.h>
 #include <Tactility/file/File.h>
 #include <Tactility/network/HttpdReq.h>
 #include <Tactility/network/Url.h>
+#include <Tactility/Paths.h>
 #include <Tactility/service/development/DevelopmentSettings.h>
 #include <Tactility/service/ServiceManifest.h>
 #include <Tactility/service/ServiceRegistration.h>
@@ -247,7 +247,7 @@ esp_err_t DevelopmentService::handleAppInstall(httpd_req_t* request) {
     }
     content_left -= content_read;
 
-    const std::string tmp_path = app::getTempPath();
+    const std::string tmp_path = getTempPath();
     auto lock = file::getLock(tmp_path)->asScopedLock();
 
     lock.lock();