diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -135,7 +135,6 @@
     notificationoptions.cpp
 
     syntaxhighlightingmanager.cpp
-    copyfilejob.cpp
 
     receivetypingnotificationmanager.cpp
 
diff --git a/src/core/copyfilejob.h b/src/core/copyfilejob.h
deleted file mode 100644
--- a/src/core/copyfilejob.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-   Copyright (c) 2018-2020 Laurent Montel <montel@kde.org>
-
-   This library is free software; you can redistribute it and/or modify
-   it under the terms of the GNU Library General Public License as published
-   by the Free Software Foundation; either version 2 of the License or
-   ( at your option ) version 3 or, at the discretion of KDE e.V.
-   ( which shall act as a proxy as in section 14 of the GPLv3 ), any later version.
-
-   This library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public License
-   along with this library; see the file COPYING.LIB.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.
-*/
-
-#ifndef COPYFILEJOB_H
-#define COPYFILEJOB_H
-
-#include <KJob>
-
-class CopyFileJob : public KJob
-{
-    Q_OBJECT
-public:
-    explicit CopyFileJob(QObject *parent = nullptr);
-    ~CopyFileJob() override = default;
-
-    void start() override;
-
-    void setLocalFile(const QString &localFile);
-
-    void setCachedFile(const QString &cachedFile);
-
-private:
-    Q_DISABLE_COPY(CopyFileJob)
-    QString mLocalFile;
-    QString mCachedFile;
-};
-
-#endif // COPYFILEJOB_H
diff --git a/src/core/copyfilejob.cpp b/src/core/copyfilejob.cpp
deleted file mode 100644
--- a/src/core/copyfilejob.cpp
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
-   Copyright (c) 2018-2020 Laurent Montel <montel@kde.org>
-
-   This library is free software; you can redistribute it and/or modify
-   it under the terms of the GNU Library General Public License as published
-   by the Free Software Foundation; either version 2 of the License or
-   ( at your option ) version 3 or, at the discretion of KDE e.V.
-   ( which shall act as a proxy as in section 14 of the GPLv3 ), any later version.
-
-   This library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public License
-   along with this library; see the file COPYING.LIB.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.
-*/
-
-#include "copyfilejob.h"
-#include "ruqola_debug.h"
-#include <QFile>
-
-CopyFileJob::CopyFileJob(QObject *parent)
-    : KJob(parent)
-{
-}
-
-void CopyFileJob::start()
-{
-    if (mLocalFile.isEmpty() || mCachedFile.isEmpty()) {
-        qCWarning(RUQOLA_LOG) << " localfile or cachedfile not defined";
-    } else {
-        QFile f(mCachedFile);
-        if (!f.copy(mLocalFile)) {
-            qCWarning(RUQOLA_LOG) << "Impossible to copy " << mCachedFile << " to " << mLocalFile;
-        }
-    }
-}
-
-void CopyFileJob::setLocalFile(const QString &localFile)
-{
-    mLocalFile = localFile;
-}
-
-void CopyFileJob::setCachedFile(const QString &cachedFile)
-{
-    mCachedFile = cachedFile;
-}
diff --git a/src/core/rocketchatcache.cpp b/src/core/rocketchatcache.cpp
--- a/src/core/rocketchatcache.cpp
+++ b/src/core/rocketchatcache.cpp
@@ -24,7 +24,6 @@
 #include "managerdatapaths.h"
 #include "restapirequest.h"
 #include "avatarmanager.h"
-#include "copyfilejob.h"
 #include <QDateTime>
 #include <QDir>
 #include <QSettings>
@@ -94,16 +93,16 @@
 
 void RocketChatCache::downloadFile(const QString &url, const QUrl &localFile, bool storeInCache)
 {
-    if (fileInCache(QUrl(url))) {
-        auto *job = new CopyFileJob(this);
-        job->setCachedFile(fileCachePath(QUrl(url)));
-        job->setLocalFile(localFile.toString());
-        job->start();
+    QFile f(fileCachePath(QUrl(url)));
+    if (f.exists()) {
+        if (!f.copy(localFile.toLocalFile())) {
+            qCWarning(RUQOLA_LOG) << "Impossible to copy" << f.fileName() << "to" << localFile;
+        }
     } else {
-        //Redownload it. TODO inform user ?
-        //FIXME we don't use localfile!
+        // Not in cache. We need to download it (e.g. file attachment).
         const QUrl clickedUrl = generateDownloadFile(url);
         mAccount->restApi()->downloadFile(clickedUrl, QStringLiteral("text/plain"), storeInCache, localFile);
+        // this will call slotDataDownloaded
     }
 }