Missed the data folder configuration step

Dear community,

I've just installed the latest server package onto my OVH host (will come later back on this point). I had previously created a DATA folder out of the www space, via ftp.

Unfortunately, when connecting for the first time to ownCloud, I've probably missed the data folder configuration step, as I cannot set this ../DATA folder as the primary data location.

Tried to overwrite all core files but to no avail... Is there any way I can start the whole installation from scratch again? Or is there any way I can configure the ownCloud server to point to the desired files location now?

Thanks in advance for any help!

Server configuration
Operating system: ?
Web server: Apache
Database: mySQL
PHP version: 5.5
ownCloud version (see ownCloud admin page): latest
Updated from an older ownCloud or fresh install: fresh install
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):

ownCloud log (data/owncloud.log)

{"reqId":"WKHocQoAGy4AAEEI5FcAAAAt","remoteAddr":"88.179.69.9","app":"index","message":"Exception: {\"Exception\":\"Exception\",\"Message\":\"Session has been closed - no further changes to the session are allowed\",\"Code\":0,\"Trace\":\"#0 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/Session\\/Memory.php(52): OC\\Session\\Memory->validateSession()\n#1 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/Security\\/CSRF\\/TokenStorage\\/SessionStorage.php(63): OC\\Session\\Memory->set('requesttoken', 'kAEMr8iD64qMsKI...')\n#2 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/Security\\/CSRF\\/CsrfTokenManager.php(57): OC\\Security\\CSRF\\TokenStorage\\SessionStorage->setToken('kAEMr8iD64qMsKI...')\n#3 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/public\\/Util.php(505): OC\\Security\\CSRF\\CsrfTokenManager->getToken(*** sensitive parameters replaced ***)\n#4 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/legacy\\/template.php(79): OCP\\Util::callRegister()\n#5 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/legacy\\/template.php(306): OC_Template->_construct('', 'installation', 'guest')\n#6 \\/home\\/jeanlucghq\\/www\\/owncloud\\/core\\/Controller\\/SetupController.php(95): OCTemplate::printGuestPage('', 'installation', Array)\n#7 \\/home\\/jeanlucghq\\/www\\/owncloud\\/core\\/Controller\\/SetupController.php(75): OC\\Core\\Controller\\SetupController->display(Array)\n#8 \\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/base.php(829): OC\\Core\\Controller\\SetupController->run(Array)\n#9 \\/home\\/jeanlucghq\\/www\\/owncloud\\/index.php(54): OC::handleRequest()\n#10 {main}\",\"File\":\"\\/home\\/jeanlucghq\\/www\\/owncloud\\/lib\\/private\\/Session\\/Memory.php\",\"Line\":119}","level":3,"time":"2017-02-13T17:10:16+00:00","method":"GET","url":"\/owncloud\/","user":"--"}
{"reqId":"WKHocQoAGy4AAEEI5FcAAAAt","remoteAddr":"88.179.69.9","app":"PHP","message":"chmod(): No such file or directory at \/home\/jeanlucghq\/www\/owncloud\/lib\/private\/Log\/Owncloud.php#114","level":3,"time":"2017-02-13T17:10:17+00:00","method":"GET","url":"\/owncloud\/","user":"--"}
{"reqId":"WKKpmwoAPVUAAGTI3TMAAABI","remoteAddr":"88.179.69.9","app":"PHP","message":"Zend OPcache API is restricted by \"restrict_api\" configuration directive at \/home\/jeanlucghq\/www\/cloud\/lib\/private\/legacy\/util.php#1361","level":3,"time":"2017-02-14T06:54:19+00:00","method":"POST","url":"\/cloud\/index.php","user":"--"}
{"reqId":"WKKpmwoAPVUAAGTI3TMAAABI","remoteAddr":"88.179.69.9","app":"PHP","message":"Zend OPcache API is restricted by \"restrict_api\" configuration directive at \/home\/jeanlucghq\/www\/cloud\/lib\/private\/legacy\/util.php#1361","level":3,"time":"2017-02-14T06:54:23+00:00","method":"POST","url":"\/cloud\/index.php","user":"--"}
{"reqId":"WKKpmwoAPVUAAGTI3TMAAABI","remoteAddr":"88.179.69.9","app":"PHP","message":"Zend OPcache API is restricted by \"restrict_api\" configuration directive at \/home\/jeanlucghq\/www\/cloud\/lib\/private\/legacy\/util.php#1361","level":3,"time":"2017-02-14T06:54:23+00:00","method":"POST","url":"\/cloud\/index.php","user":"admin_jlgarnier"}
{"reqId":"WKKs0woAPVUAACYiAIYAAABF","remoteAddr":"88.179.69.9","app":"core","message":"Login failed: 'admin_jlgarnier' (Remote IP: '88.179.69.9')","level":2,"time":"2017-02-14T07:08:03+00:00","method":"POST","url":"\/cloud\/index.php\/login","user":"--"}

Integrity status for oC9+

Technical information
=====================
The following list covers which files have failed the integrity check. Please read
the previous linked documentation to learn more about the errors and how to fix
them.
Results
=======
- core
	- INVALID_HASH
		- core/fonts/LICENSE.txt
		- core/vendor/jsTimezoneDetect/jstz.js
- files_external
	- INVALID_HASH
		- 3rdparty/Dropbox/API.php
- files_texteditor
	- INVALID_HASH
		- js/vendor/ace/src-noconflict/mode-diff.js
Raw output
==========
Array
(
    [core] => Array
        (
            [INVALID_HASH] => Array
                (
                    [core/fonts/LICENSE.txt] => Array
                        (
                            [expected] => 4cc5a12bfe984c0a50bf7943e2d70a948d520ef423677c77629707aace3a95aa378d205de929105d644680679e70ef2449479b360ad44896b75bafed66613272
                            [current] => 98f6b79b778f7b0a15415bd750c3a8a097d650511cb4ec8115188e115c47053fe700f578895c097051c9bc3dfb6197c2b13a15de203273e1a3218884f86e90e8
                        )
                    [core/vendor/jsTimezoneDetect/jstz.js] => Array
                    (
                        [expected] => ece74dd6f5fc9587cf167dd17df51b66f70bd711f445da8d1d21bb1b0570f3c97b25d3ece110b08e2f2b294369d9b775cc169b666840a5b769ba338aa6d73d48
                        [current] => beae737d18aae6e8c5fdfb0bf3389b687ec746e6b334185710cc5b8f45b73b3c57442db541807ab440b55517ef2d138f4c40148abafcb6462481016b617e1f53
                    )

            )

    )

[files_external] => Array
    (
        [INVALID_HASH] => Array
            (
                [3rdparty/Dropbox/API.php] => Array
                    (
                        [expected] => a6866ef3ceeb26d9d4b2ccc343aeaf626c82f03e279962bc7d761a68e87e5a7916ff0bcf7a350e20889557336ed9c5dd1651cfe513fa04bb8a03cd6d8f9cc484
                        [current] => 917eed2c4f6359a4d0b8658a36404c83344b0bf72ccda614dd59f97d099b3d9ef4e86691401c64d3754c3f7e0fa163eab946a25dbc7bc65e1694ffd47a054317
                    )

            )

    )

[files_texteditor] => Array
    (
        [INVALID_HASH] => Array
            (
                [js/vendor/ace/src-noconflict/mode-diff.js] => Array
                    (
                        [expected] => 4a59b6376376b81e4e12ccc345065db62029a61035a88e19b1be3d7ec4cd9f86444121cca6d46c44a5f86e4f5b44d5109cbc77e80c07ff8dbce61f758b88e765
                        [current] => 298cba4d3b472b418aca47db6522c752a4b5530de3f6f2d83eb42eb5fe4231356bfd860a7e2f735b3e5ced759dbc6ca26fc6a18c49bd7ffa07d5a6faa78ae51d
                    )

            )

    )
)

Hi,

Is this still relevant or did the problem solve itself?