Virtual Machine startup Error

[Delantu]

Hello,

so i copied my vms (the .vdi File etc) from my ssd to an external sd and then onto a new ssd.
Now after importing the vms i get an error:
"
Could not find an open hard disk with UUID {b646cd22-a209-421f-8896-f227b2b72b12}.:

Result Code:
VBOX_E_OBJECT_NOT_FOUND (0X80BB0001)
"

Could the files be damaged on the sd card or is there another reason for it?
Thanks.