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# How to make your Synology Router perform as Apple Time Capsule compatible device
- URL: https://ostreff.info/how-to-make-your-synology-router-timecapsule-compatible/
- Published: 2022-12-07T17:25:37.000Z
- Updated: 2022-12-11T08:47:50.000Z
- Author: Jordan Ostreff
- Tags: #srm, #Apple, #synology

Once you have found a suitable external USB drive compatible with usb 3.2/type A connector. You connect it to your router, and you're surprised to see that the [SRM OS](https://www.synology.com/en-global/srm?ref=ostreff.info) on device says you can't use that disk. You go to the [synology](https://www.synology.com/?ref=ostreff.info) website to check if there is a [compatibility list](https://www.synology.com/en-eu/compatibility?ref=ostreff.info) and you are unpleasantly surprised by the fact that it is very poor. Of course, the external drive you have already purchased is not on the list. What next?

![](https://ostreff.info/content/images/2022/12/srm13-1.jpeg)

Connect the drive to your computer and see what's on it using the command

```bash
diskutil list
/dev/disk2
#:                       TYPE NAME                    SIZE       IDENTIFIER
0:      GUID_partition_scheme                        *2000.0 GB    disk2
```

Is the problem not due to the disk being GPT and not MBR? Let's try to change it. Please note that this operation erases whatever is on the disk.

```bash
diskutil unmount /dev/disk2

diskutil eraseDisk FAT32 EMPTY MBRFormat /dev/disk2
```

If you are using an old version of MacOS ( The error may occur from Mac OS Leopard 10.5 to Yosemite 10.10\. ) you will see an error like this:

```bash
FAT32 does not appear to be a valid file system format
Use diskutil listFilesystems to view a list of supported file systems
```

Find the correct filesystem alias by listing all available options:

```bash
diskutil listFilesystems

diskutil eraseDisk "ms-dos fat32" EMPTY MBRFormat /dev/disk2
```

The miracle happens and now SRM sees the disk, can reformat it, etc.   
I highly recommend reformatting it as ext4 filesystem.

![](https://ostreff.info/content/images/2022/12/time-machine-running.jpg)