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diff --git a/backends/cloud/dropbox/dropboxstorage.cpp b/backends/cloud/dropbox/dropboxstorage.cpp
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+++ b/backends/cloud/dropbox/dropboxstorage.cpp
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/cloud/dropbox/dropboxstorage.h"
+#include "backends/cloud/dropbox/dropboxcreatedirectoryrequest.h"
+#include "backends/cloud/dropbox/dropboxinforequest.h"
+#include "backends/cloud/dropbox/dropboxlistdirectoryrequest.h"
+#include "backends/cloud/dropbox/dropboxuploadrequest.h"
+#include "backends/cloud/cloudmanager.h"
+#include "backends/networking/curl/connectionmanager.h"
+#include "backends/networking/curl/curljsonrequest.h"
+#include "common/config-manager.h"
+#include "common/debug.h"
+#include "common/json.h"
+#include <curl/curl.h>
+
+#ifdef ENABLE_RELEASE
+#include "dists/clouds/cloud_keys.h"
+#endif
+
+namespace Cloud {
+namespace Dropbox {
+
+#define DROPBOX_OAUTH2_TOKEN "https://api.dropboxapi.com/oauth2/token"
+#define DROPBOX_API_FILES_DOWNLOAD "https://content.dropboxapi.com/2/files/download"
+
+char *DropboxStorage::KEY = nullptr; //can't use CloudConfig there yet, loading it on instance creation/auth
+char *DropboxStorage::SECRET = nullptr;
+
+void DropboxStorage::loadKeyAndSecret() {
+#ifdef ENABLE_RELEASE
+	KEY = RELEASE_DROPBOX_KEY;
+	SECRET = RELEASE_DROPBOX_SECRET;
+#else
+	Common::String k = ConfMan.get("DROPBOX_KEY", ConfMan.kCloudDomain);
+	KEY = new char[k.size() + 1];
+	memcpy(KEY, k.c_str(), k.size());
+	KEY[k.size()] = 0;
+
+	k = ConfMan.get("DROPBOX_SECRET", ConfMan.kCloudDomain);
+	SECRET = new char[k.size() + 1];
+	memcpy(SECRET, k.c_str(), k.size());
+	SECRET[k.size()] = 0;
+#endif
+}
+
+DropboxStorage::DropboxStorage(Common::String accessToken, Common::String userId): _token(accessToken), _uid(userId) {}
+
+DropboxStorage::DropboxStorage(Common::String code) {
+	getAccessToken(code);
+}
+
+DropboxStorage::~DropboxStorage() {}
+
+void DropboxStorage::getAccessToken(Common::String code) {
+	if (!KEY || !SECRET)
+		loadKeyAndSecret();
+	Networking::JsonCallback callback = new Common::Callback<DropboxStorage, Networking::JsonResponse>(this, &DropboxStorage::codeFlowComplete);
+	Networking::ErrorCallback errorCallback = new Common::Callback<DropboxStorage, Networking::ErrorResponse>(this, &DropboxStorage::codeFlowFailed);
+	Networking::CurlJsonRequest *request = new Networking::CurlJsonRequest(callback, errorCallback, DROPBOX_OAUTH2_TOKEN);
+	request->addPostField("code=" + code);
+	request->addPostField("grant_type=authorization_code");
+	request->addPostField("client_id=" + Common::String(KEY));
+	request->addPostField("client_secret=" + Common::String(SECRET));
+	if (Cloud::CloudManager::couldUseLocalServer()) {
+		request->addPostField("&redirect_uri=http%3A%2F%2Flocalhost%3A12345%2F");
+	} else {
+		request->addPostField("&redirect_uri=https%3A%2F%2Fwww.scummvm.org/c/code");
+	}
+	addRequest(request);
+}
+
+void DropboxStorage::codeFlowComplete(Networking::JsonResponse response) {
+	Common::JSONValue *json = (Common::JSONValue *)response.value;
+	if (json == nullptr) {
+		debug(9, "DropboxStorage::codeFlowComplete: got NULL instead of JSON!");
+		CloudMan.removeStorage(this);
+		return;
+	}
+
+	if (!json->isObject()) {
+		debug(9, "DropboxStorage::codeFlowComplete: Passed JSON is not an object!");
+		CloudMan.removeStorage(this);
+		delete json;
+		return;
+	}
+
+	Common::JSONObject result = json->asObject();
+	if (!Networking::CurlJsonRequest::jsonContainsString(result, "access_token", "DropboxStorage::codeFlowComplete") ||
+		!Networking::CurlJsonRequest::jsonContainsString(result, "uid", "DropboxStorage::codeFlowComplete")) {
+		warning("DropboxStorage: bad response, no token/uid passed");
+		debug(9, "%s", json->stringify(true).c_str());
+		CloudMan.removeStorage(this);
+	} else {
+		_token = result.getVal("access_token")->asString();
+		_uid = result.getVal("uid")->asString();
+		ConfMan.removeKey("dropbox_code", ConfMan.kCloudDomain);
+		CloudMan.replaceStorage(this, kStorageDropboxId);
+		ConfMan.flushToDisk();
+	}
+
+	delete json;
+}
+
+void DropboxStorage::codeFlowFailed(Networking::ErrorResponse error) {
+	debug(9, "DropboxStorage: code flow failed (%s, %ld):", (error.failed ? "failed" : "interrupted"), error.httpResponseCode);
+	debug(9, "%s", error.response.c_str());
+	CloudMan.removeStorage(this);
+}
+
+void DropboxStorage::saveConfig(Common::String keyPrefix) {
+	ConfMan.set(keyPrefix + "access_token", _token, ConfMan.kCloudDomain);
+	ConfMan.set(keyPrefix + "user_id", _uid, ConfMan.kCloudDomain);
+}
+
+Common::String DropboxStorage::name() const {
+	return "Dropbox";
+}
+
+Networking::Request *DropboxStorage::listDirectory(Common::String path, ListDirectoryCallback outerCallback, Networking::ErrorCallback errorCallback, bool recursive) {
+	return addRequest(new DropboxListDirectoryRequest(_token, path, outerCallback, errorCallback, recursive));
+}
+
+Networking::Request *DropboxStorage::upload(Common::String path, Common::SeekableReadStream *contents, UploadCallback callback, Networking::ErrorCallback errorCallback) {
+	return addRequest(new DropboxUploadRequest(_token, path, contents, callback, errorCallback));
+}
+
+Networking::Request *DropboxStorage::streamFileById(Common::String path, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback) {
+	Common::JSONObject jsonRequestParameters;
+	jsonRequestParameters.setVal("path", new Common::JSONValue(path));
+	Common::JSONValue value(jsonRequestParameters);
+
+	Networking::CurlRequest *request = new Networking::CurlRequest(nullptr, nullptr, DROPBOX_API_FILES_DOWNLOAD); //TODO: is it OK to pass no callbacks?
+	request->addHeader("Authorization: Bearer " + _token);
+	request->addHeader("Dropbox-API-Arg: " + Common::JSON::stringify(&value));
+	request->addHeader("Content-Type: "); //required to be empty (as we do POST, it's usually app/form-url-encoded)
+
+	Networking::NetworkReadStreamResponse response = request->execute();
+	if (callback)
+		(*callback)(response);
+	return response.request; // no leak here, response.request == request
+}
+
+Networking::Request *DropboxStorage::createDirectory(Common::String path, BoolCallback callback, Networking::ErrorCallback errorCallback) {
+	if (!errorCallback)
+		errorCallback = getErrorPrintingCallback();
+	return addRequest(new DropboxCreateDirectoryRequest(_token, path, callback, errorCallback));
+}
+
+Networking::Request *DropboxStorage::info(StorageInfoCallback callback, Networking::ErrorCallback errorCallback) {
+	if (!errorCallback)
+		errorCallback = getErrorPrintingCallback();
+	return addRequest(new DropboxInfoRequest(_token, callback, errorCallback));
+}
+
+Common::String DropboxStorage::savesDirectoryPath() { return "/saves/"; }
+
+DropboxStorage *DropboxStorage::loadFromConfig(Common::String keyPrefix) {
+	loadKeyAndSecret();
+
+	if (!ConfMan.hasKey(keyPrefix + "access_token", ConfMan.kCloudDomain)) {
+		warning("DropboxStorage: no access_token found");
+		return nullptr;
+	}
+
+	if (!ConfMan.hasKey(keyPrefix + "user_id", ConfMan.kCloudDomain)) {
+		warning("DropboxStorage: no user_id found");
+		return nullptr;
+	}
+
+	Common::String accessToken = ConfMan.get(keyPrefix + "access_token", ConfMan.kCloudDomain);
+	Common::String userId = ConfMan.get(keyPrefix + "user_id", ConfMan.kCloudDomain);
+
+	return new DropboxStorage(accessToken, userId);
+}
+
+} // End of namespace Dropbox
+} // End of namespace Cloud