Do you have the appropriate version of the driver for Big Sur? You'll need to change a security setting to get it to work on an Apple Silicon Mac. https://www.seagate.com/support/software/paragon/
Do you have the appropriate version of the driver for Big Sur? You'll need to change a security setting to get it to work on an Apple Silicon Mac. https://www.seagate.com/support/software/paragon/