FreeFileSync Forum

I believe so. I'm not using Free File Sync anymore so I cannot tell if there is still an issue.

This is a known issue for SMB protocol in macOS. You should change to AFP and get it done just fine.
Other software parties have already adapted in order to make it easier to switch.

LINK:
https://bombich.com/kb/ccc6/macos-monterey-known-issues

Apple's SMB filesystem client causes system stalls ...

UPDATE : If anymore else find this and are facing the same issue. This is now a known issue for Big Sur and SMB protocol. The workaround solutions are as follows:

a) Change the communication protocol to AFP
PRO: easier if you have already the volume all set
CONS: it's slower than SMB 3.1

b ...

I've been dealing with this same issue for a while now. After some apple care support, messing around with rsync and all kinds of testing finally I was able to find the culprit.

For all you of who are facing this, I would run apple built in diagnostic (making sure hardware is fine).

Then you can ...

I've been using FFS 11.3 ARM version since it came out. I've been waiting to fully tested this before posting here but I'm afraid something in the app is triggering kernel panics on macOS. I must have 10 to 15 crash logs by now.

After several attempts using different scenarios, my findings are ...

As a side note, just copied 3GB in under 20 sec locally, and 138GB in about 1 hour remotely. Everything seems to work fine, no slowdowns or random crashes, so far so good! Excited to hear that, thank you

Hey, it is indeed running as ARM64. I've attached a screenshot from Get info and also from about-storage-manage-apps, where those selected as universal are running natively. All checked out.

Update:
As soon as I launch the app it just shows this window "running arm64 build natively" and nothing happens afterwards. Tried running a batch created with older version without success. It pops the same window!

I've uninstalled the old version and installed this one. It kept the preferences ...

I was facing the same issues. I've just installed the M1 beta.
Let me know if you need me to test anything specific. Huge thanks for this!!