To use the TRIM command over usb support for USB Attached SCSI - Wikipedia is required.
I’m not sure for Vero 4K+ has necessary hardware. If it does, could you please consider adding support so USB SSD drives which support TRIM can be used.
As mentioned in your previous post, our DWC OTG implementation doesn’t support this. However, as your files are static (rarely updated) and you are not using this to run the OS on, you don’t need to worry about TRIM particularly. You can run periodic trims by connecting your hard drive to your PC periodically.
We will support it in a future hardware revision, but have no ETA for this presently.