diff --git a/interfaces/feedstorage.h b/interfaces/feedstorage.h
--- a/interfaces/feedstorage.h
+++ b/interfaces/feedstorage.h
@@ -49,14 +49,6 @@
     /** returns the guids of all articles in this storage. */
     virtual QStringList articles() const = 0;
 
-    /** Appends all articles from another storage. If there is already an article in this feed with the same guid, it is replaced by the article from the source
-    @param source the archive which articles should be appended
-    */
-    virtual void add(FeedStorage *source) = 0;
-
-    /** reads an article from another storage and adds it to this storage */
-    virtual void copyArticle(const QString &guid, FeedStorage *source) = 0;
-
     /** deletes all articles from the archive */
     virtual void clear() = 0;
 
diff --git a/interfaces/storage.h b/interfaces/storage.h
--- a/interfaces/storage.h
+++ b/interfaces/storage.h
@@ -73,7 +73,7 @@
      * Closes storage, freeing all allocated resources. Called from destructor, so you don't need to call it directly.
      * @return true on success.
      */
-    virtual bool close() = 0;
+    virtual void close() = 0;
 
     /**
      * @return Article archive for feed at given url.
@@ -99,11 +99,6 @@
 
     virtual QStringList feeds() const = 0;
 
-    /** adds all feed storages from a source to this storage
-        existing articles are replaced
-    */
-    virtual void add(Storage *source) = 0;
-
     /** deletes all feed storages in this archive */
     virtual void clear() = 0;
 };
diff --git a/plugins/mk4storage/feedstoragemk4impl.h b/plugins/mk4storage/feedstoragemk4impl.h
--- a/plugins/mk4storage/feedstoragemk4impl.h
+++ b/plugins/mk4storage/feedstoragemk4impl.h
@@ -34,8 +34,6 @@
     FeedStorageMK4Impl(const QString &url, StorageMK4Impl *main);
     ~FeedStorageMK4Impl();
 
-    void add(FeedStorage *source) override;
-    void copyArticle(const QString &guid, FeedStorage *source) override;
     void clear() override;
 
     int unread() const override;
diff --git a/plugins/mk4storage/feedstoragemk4impl.cpp b/plugins/mk4storage/feedstoragemk4impl.cpp
--- a/plugins/mk4storage/feedstoragemk4impl.cpp
+++ b/plugins/mk4storage/feedstoragemk4impl.cpp
@@ -483,35 +483,6 @@
     markDirty();
 }
 
-void FeedStorageMK4Impl::add(FeedStorage *source)
-{
-    QStringList articles = source->articles();
-    for (QStringList::ConstIterator it = articles.constBegin(); it != articles.constEnd(); ++it) {
-        copyArticle(*it, source);
-    }
-    setUnread(source->unread());
-    setLastFetch(source->lastFetch());
-    setTotalCount(source->totalCount());
-}
-
-void FeedStorageMK4Impl::copyArticle(const QString &guid, FeedStorage *source)
-{
-    if (!contains(guid)) {
-        addEntry(guid);
-    }
-    setDescription(guid, source->description(guid));
-    setGuidIsHash(guid, source->guidIsHash(guid));
-    setGuidIsPermaLink(guid, source->guidIsPermaLink(guid));
-    setHash(guid, source->hash(guid));
-    setLink(guid, source->link(guid));
-    setPubDate(guid, source->pubDate(guid));
-    setStatus(guid, source->status(guid));
-    setTitle(guid, source->title(guid));
-    setAuthorName(guid, source->authorName(guid));
-    setAuthorUri(guid, source->authorUri(guid));
-    setAuthorEMail(guid, source->authorEMail(guid));
-}
-
 void FeedStorageMK4Impl::setEnclosure(const QString &guid, const QString &url, const QString &type, int length)
 {
     int findidx = findArticle(guid);
diff --git a/plugins/mk4storage/storagemk4impl.h b/plugins/mk4storage/storagemk4impl.h
--- a/plugins/mk4storage/storagemk4impl.h
+++ b/plugins/mk4storage/storagemk4impl.h
@@ -78,7 +78,7 @@
      * Closes storage, freeing all allocated resources. Called from destructor, so you don't need to call it directly.
      * @return true on success.
      */
-    bool close() override;
+    void close() override;
 
     /**
      * @return Article archive for feed at given url.
@@ -99,11 +99,6 @@
     void storeFeedList(const QString &opmlStr) override;
     QString restoreFeedList() const override;
 
-    /** adds all feed storages from a source to this storage
-        existing articles are replaced
-    */
-    void add(Storage *source) override;
-
     /** deletes all feed storages in this archive */
     void clear() override;
 
diff --git a/plugins/mk4storage/storagemk4impl.cpp b/plugins/mk4storage/storagemk4impl.cpp
--- a/plugins/mk4storage/storagemk4impl.cpp
+++ b/plugins/mk4storage/storagemk4impl.cpp
@@ -153,7 +153,7 @@
     return d->autoCommit;
 }
 
-bool Akregator::Backend::StorageMK4Impl::close()
+void Akregator::Backend::StorageMK4Impl::close()
 {
     QMap<QString, FeedStorageMK4Impl *>::Iterator it;
     QMap<QString, FeedStorageMK4Impl *>::Iterator end(d->feeds.end());
@@ -171,8 +171,6 @@
     d->feedListStorage->Commit();
     delete d->feedListStorage;
     d->feedListStorage = 0;
-
-    return true;
 }
 
 bool Akregator::Backend::StorageMK4Impl::commit()
@@ -304,17 +302,6 @@
     return list;
 }
 
-void Akregator::Backend::StorageMK4Impl::add(Storage *source)
-{
-    QStringList feeds = source->feeds();
-    QStringList::ConstIterator end(feeds.constEnd());
-
-    for (QStringList::ConstIterator it = feeds.constBegin(); it != end; ++it) {
-        FeedStorage *fa = archiveFor(*it);
-        fa->add(source->archiveFor(*it));
-    }
-}
-
 void Akregator::Backend::StorageMK4Impl::clear()
 {
     QStringList feeds;
diff --git a/src/dummystorage/feedstoragedummyimpl.h b/src/dummystorage/feedstoragedummyimpl.h
--- a/src/dummystorage/feedstoragedummyimpl.h
+++ b/src/dummystorage/feedstoragedummyimpl.h
@@ -35,9 +35,6 @@
     FeedStorageDummyImpl(const QString &url, StorageDummyImpl *main);
     ~FeedStorageDummyImpl() override;
 
-    void add(FeedStorage *source) override;
-    void copyArticle(const QString &guid, FeedStorage *source) override;
-
     void clear() override;
     int unread() const override;
     void setUnread(int unread) override;
diff --git a/src/dummystorage/feedstoragedummyimpl.cpp b/src/dummystorage/feedstoragedummyimpl.cpp
--- a/src/dummystorage/feedstoragedummyimpl.cpp
+++ b/src/dummystorage/feedstoragedummyimpl.cpp
@@ -317,34 +317,6 @@
     }
 }
 
-void FeedStorageDummyImpl::add(FeedStorage *source)
-{
-    QStringList articles = source->articles();
-    for (QStringList::ConstIterator it = articles.constBegin(); it != articles.constEnd(); ++it) {
-        copyArticle(*it, source);
-    }
-    setUnread(source->unread());
-    setLastFetch(source->lastFetch());
-    setTotalCount(source->totalCount());
-}
-
-void FeedStorageDummyImpl::copyArticle(const QString &guid, FeedStorage *source)
-{
-    if (!contains(guid)) {
-        addEntry(guid);
-    }
-
-    setDescription(guid, source->description(guid));
-    setContent(guid, source->content(guid));
-    setGuidIsHash(guid, source->guidIsHash(guid));
-    setGuidIsPermaLink(guid, source->guidIsPermaLink(guid));
-    setHash(guid, source->hash(guid));
-    setLink(guid, source->link(guid));
-    setPubDate(guid, source->pubDate(guid));
-    setStatus(guid, source->status(guid));
-    setTitle(guid, source->title(guid));
-}
-
 void FeedStorageDummyImpl::clear()
 {
     d->entries.clear();
diff --git a/src/dummystorage/storagedummyimpl.h b/src/dummystorage/storagedummyimpl.h
--- a/src/dummystorage/storagedummyimpl.h
+++ b/src/dummystorage/storagedummyimpl.h
@@ -65,7 +65,7 @@
      * Closes storage, freeing all allocated resources. Called from destructor, so you don't need to call it directly.
      * @return true on success.
      */
-    bool close() override;
+    void close() override;
 
     /**
      * @return Article archive for feed at given url.
@@ -84,11 +84,6 @@
     void storeFeedList(const QString &opmlStr) override;
     QString restoreFeedList() const override;
 
-    /** adds all feed storages from a source to this storage
-        existing articles are replaced
-    */
-    void add(Storage *source) override;
-
     /** deletes all feed storages in this archive */
     void clear() override;
 
diff --git a/src/dummystorage/storagedummyimpl.cpp b/src/dummystorage/storagedummyimpl.cpp
--- a/src/dummystorage/storagedummyimpl.cpp
+++ b/src/dummystorage/storagedummyimpl.cpp
@@ -63,6 +63,7 @@
 
 StorageDummyImpl::~StorageDummyImpl()
 {
+    close();
     delete d;
     d = nullptr;
 }
@@ -81,13 +82,12 @@
     return false;
 }
 
-bool StorageDummyImpl::close()
+void StorageDummyImpl::close()
 {
     for (QHash<QString, StorageDummyImplPrivate::Entry>::ConstIterator it = d->feeds.constBegin(); it != d->feeds.constEnd(); ++it) {
         (*it).feedStorage->close();
         delete(*it).feedStorage;
     }
-    return true;
 }
 
 bool StorageDummyImpl::commit()
@@ -169,15 +169,6 @@
     return d->feeds.keys();
 }
 
-void StorageDummyImpl::add(Storage *source)
-{
-    QStringList feeds = source->feeds();
-    for (QStringList::ConstIterator it = feeds.constBegin(); it != feeds.constEnd(); ++it) {
-        FeedStorage *fa = archiveFor(*it);
-        fa->add(source->archiveFor(*it));
-    }
-}
-
 void StorageDummyImpl::clear()
 {
     for (QHash<QString, StorageDummyImplPrivate::Entry>::ConstIterator it = d->feeds.constBegin(); it != d->feeds.constEnd(); ++it) {