упорядочил папки с кодом.

src/Common/Passes/All/ArchivesBackupPass.java

@@ -0,0 +1,51 @@
+package Common.Passes.All;
+import Common.Global;
+import Common.Utils.Utils;
+import GlobalData.Machine.Machine;
+import GlobalData.RemoteFile.RemoteFile;
+import GlobalData.User.User;
+import Common.Passes.SSH.ConnectionPass;
+import com.jcraft.jsch.ChannelSftp;
+
+import java.io.File;
+import java.nio.file.Paths;
+import java.util.Vector;
+public class ArchivesBackupPass extends ConnectionPass<File> {
+    File src;
+    @Override
+    protected boolean canStart(Object... args) throws Exception {
+        machine = (Machine) args[0];
+        user = (User) args[1];
+        src = (File) args[2];
+        return true;
+    }
+    @Override
+    protected boolean needsInitialize() {
+        return false;
+    }
+    @Override
+    protected void ServerAction() throws Exception {
+        String workspace_path = Utils.toU(Paths.get(sftpChannel.getHome(),Global.properties.BackupWorkspace).toString());
+        RemoteFile workspace = new RemoteFile(workspace_path, true);
+        tryMKDir(workspace);
+        RemoteFile dst = new RemoteFile(workspace.full_name, src.getName());
+        putSingleFile(src, dst);
+        //-теперь, удалить старые файлы.
+        Vector<ChannelSftp.LsEntry> raw_files = sftpChannel.ls(workspace.full_name);
+        Vector<RemoteFile> files = new Vector<>();
+        for (ChannelSftp.LsEntry file : raw_files) {
+            if (!file.getAttrs().isDir()) {
+                RemoteFile rfile = new RemoteFile(workspace.full_name, file.getFilename(), false);
+                rfile.updateTime = RemoteFile.convertUpdateTime(file.getAttrs().getMTime());
+                files.add(rfile);
+            }
+        }
+        //сортируем по времени обновления. по убыванию.
+        files.sort((o1, o2) -> (int) (o2.updateTime - o1.updateTime));
+        for (int i = 2; i < files.size(); ++i) {
+            System.out.println(files.get(i).full_name + ":" + files.get(i).updateTime);
+            sftpChannel.rm(files.get(i).full_name);
+        }
+        //--------------
+    }
+}