backuping my photos from my synology to my ovh storage

For near 20 years, i am backuping my photos onto my synology (ds10x, ds20x, and now ds21x).

The risk is to lose them all because of crash or during a migration from one disk/model to another disk/model.

I decided to use rclone (running on my synology) to backup this local storage to a remote storage.

               ┌──────────────────────────────────────────┐
               │              Synology NAS                │
               │------------------------------------------│
               │  /volume1/photo                          │
               │     (unencrypted)                        │
               └───────────────┬──────────────────────────┘
                               │
                               │  rclone copy / sync
                               │  (unencrypted)
                               ▼
               ┌──────────────────────────────────────────┐
               │               rclone                     │
               │------------------------------------------│
               │  Remote 1 : ovhftp:                      │
               │     → FTP connection tp OVH              │
               │     → primary                            │
               │                                          │
               │  Remote 2 : ovhcrypt:                    │
               │     → crypt layer                        │
               │     → AES‑256 CTR + scrypt               │
               │     → content crypted                    │
               │     → based on : ovhftp:/backup          │
               │                                          │
               │  rclone.conf                             │
               │     → contains keys + remotes config     │
               └───────────────┬──────────────────────────┘
                               │
                               │  crypted files
                               │  (filenames scrambled)
                               ▼
               ┌──────────────────────────────────────────┐
               │                OVH FTP                   │
               │------------------------------------------│
               │  /backup                                 │
               │     (crypted scrambled)                  │
               │     ex :                                 │
               │       8sd7f9sd7f9sd7f9sd7f9sd7f          │
               │       7f8sd9f8sd9f8sd9f8sd9f8sd          │
               └──────────────────────────────────────────┘

Some useful commands:

rclone listremotes
rclone lsd ovhftp:/backup
rclone lsd ovhcrypt:
rclone config file
rclone copy /volume1/photo ovhcrypt: --progress

Restore would work as below:

OVH /backup (crypted files)
│
▼
rclone (ovhcrypt:) → automatically decrypt
│
▼
/volume1/photo (unencrypted restored files)

rclone copy ovhcrypt: /volume1/photo --progress