While Hyper Backup is capable of backing up from USB storage devices, it is not a recommended way to do so. Hyper Backup performs backup tasks based on a schedule, which is usually not suitable for external devices that are often removed.

Instead, use USB Copy.
As the name implies, USB Copy is designed specifically to handle data backup tasks from USB devices, such as importing media from SD cards (through a USB reader) and copying data to or from USB drives.
USB Copy supports multiple backup strategies, such as multi-versioning, mirroring, and incremental.

In previous versions of Hyper Backup, you would be asked if you wanted to delete the data at the destination when removing the backup task.

This prompt has recently been removed to reduce the risk of accidental deletion.

With Snapshot Replication, you are able to schedule snapshots and replication of data in shared folders and iSCSI LUNs. The replication destination can either be a different local volume or a remote Synology NAS. To backup installed packages, Hyper Backup is required.

When using Btrfs, your Synology NAS is able to protect your data against bit rot and other forms of data degradation that may occur silently. Data Scrubbing is a crucial aspect of maintaining data integrity, and must be scheduled to run on a regular basis (once every few months).

For our users, you should first check if our security advisory has posted a resolution (better yet, subscribe to security newsletters!). If you need assistance with a workaround, contact our technical support teams.
Since 2017, Synology has worked together with security researchers to proactively improve the security of our products. Synology’s Security Bounty Program is designed to give recognition and monetary rewards to researchers that have identified potential vulnerabilities and have worked with us in a responsible way to ensure the safety of our customers. Synology's Product Security Incident Response Team (PSIRT) is responsible for running the bounty program and coordinating responses towards security-related incidents.

There is no file size limit for a single file to be backed up. However, different C2 Backup plans come with different storage sizes. Choose a plan that suits your backup needs and upgrade your plan during the subscription period if more space is needed.

Once you reset your Synology NAS, the following configurations will be changed:

1. Default "admin" account will be reset to default values.
2. UI management port will be reset to 5000/5001.
3. IP, DNS, gateway, and other net interfaces will be reset to DHCP.
4. PPPoE will be disabled.
5. Auto block will be disabled.
6. Firewall rules will be disabled.
7. Encrypted folders will be unmounted and automatic mount on startup will be disabled.
8. High-availability cluster will be removed.
9. Virtual Machine Manager cluster will be removed.

However, storage pools and the data on each volume will remain intact.

Certificates are used to prove the identity of a website. For example, when you are connecting to https://synology.com, your browser will indicate that the connection is secure. You can view the certificate for the site, indicating that it is valid for synology.com. Only specific agencies are able to assign these certificates, which enables applications, such as your browser, to be able to verify the validity and authenticity of them.

The warning appears when you connect to a website using HTTPS, but the site does not have a valid certificate, or when you are connecting via an IP address.

To solve this, you will need to use QuickConnect or by using your own domain or DDNS address together with Let's Encrypt to obtain a certificate.

Ransomware that encrypts your files are unable to directly go after snapshots. However, there are a few things that you need to keep in mind.
First, to successfully recover your files, you must have made a snapshot before encryption occurred. Depending on the frequency of snapshots taken, some data loss may occur depending on when was the last time those files were modified.
Second, depending on the number of snapshots you have chosen to retain, together with the frequency of snapshots being taken, you have a limited window of time to restore those files.
You can set up different policies for each shared folder. For example, a folder with important and often modified files can have a snapshot taken every 30 minutes, while retaining the last 1,024 snapshots. This gives you 21 days worth of restore points at 30-minute intervals. You are able to schedule snapshots down to 5 minute intervals and set retention policies based on maximum snapshots or GFS.

USB Copy can be configured to automatically back up files on USB drives and SD cards (through a card reader). Three modes are offered, multi-version, mirroring, and incremental.

Multi-versioned: Each time the task runs, a folder will be created and named with the run time. All source files will be fully copied to the destination.
Mirroring: Each time the task runs, all changes made in the source folder will be copied to the destination, making the destination folder a complete mirror copy of the source.
Incremental: Each time the task runs, newly added and modified source files will be copied to the destination.

Tip: Incremental is best suited for offloading photo/video content from cameras. Enable automatic copying to simplify your workload, especially with multiple cards.