diff --git a/hosts/genepi/backup.nix b/hosts/genepi/backup.nix
index fa7e786..4fc6435 100644
--- a/hosts/genepi/backup.nix
+++ b/hosts/genepi/backup.nix
@@ -17,7 +17,7 @@ in
   age.secrets.restic-genepi-storagebox-password.file = ../../secrets/restic-genepi-storagebox-password.age;
 
   programs.ssh.knownHosts = {
-    "${storagebox-host}".publicKey = keys.hosts.storagebox;
+    "${storagebox-host}".publicKey = keys.hosts.storagebox-rsa;
   };
 
   services.restic.backups = {
@@ -27,7 +27,7 @@ in
         "/persist"
       ];
       passwordFile = config.age.secrets.restic-genepi-storagebox-key.path;
-      repository = "sftp://${storagebox-user}@${storagebox-host}";
+      repository = "sftp://${storagebox-user}@${storagebox-host}/";
       extraOptions = [
         "sftp.command='${pkgs.sshpass}/bin/sshpass -f ${config.age.secrets.restic-genepi-storagebox-password.path} -- ssh ${storagebox-host} -l ${storagebox-user} -s sftp'"
       ];
@@ -35,6 +35,12 @@ in
         OnCalendar = "03:00";
         RandomizedDelaySec = "1h";
       };
+      pruneOpts = [
+        "--keep-daily 7"
+        "--keep-weekly 5"
+        "--keep-monthly 12"
+        "--keep-yearly 10"
+      ];
     };
   };
 }
diff --git a/parts/keys.nix b/parts/keys.nix
index 16c77c7..c44491a 100644
--- a/parts/keys.nix
+++ b/parts/keys.nix
@@ -4,5 +4,6 @@
   hosts = {
     genepi = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICQUzjid5mfMYginIUCVWTF7rWvWz0mUZBZsl5EhDIDl root@genepi";
     storagebox = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIICf9svRenC/PLKIL9nk6K/pxQgoiFC41wTNvoIncOxs";
+    storagebox-rsa = "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5EB5p/5Hp3hGW1oHok+PIOH9Pbn7cnUiGmUEBrCVjnAw+HrKyN8bYVV0dIGllswYXwkG/+bgiBlE6IVIBAq+JwVWu1Sss3KarHY3OvFJUXZoZyRRg/Gc/+LRCE7lyKpwWQ70dbelGRyyJFH36eNv6ySXoUYtGkwlU5IVaHPApOxe4LHPZa/qhSRbPo2hwoh0orCtgejRebNtW5nlx00DNFgsvn8Svz2cIYLxsPVzKgUxs8Zxsxgn+Q/UvR7uq4AbAhyBMLxv7DjJ1pc7PJocuTno2Rw9uMZi1gkjbnmiOh6TTXIEWbnroyIhwc8555uto9melEUmWNQ+C+PwAK+MPw==";
   };
 }