LibreELEC = Linux + Kodi , so I'm a bit confused there since you stopped the Kodi application. All that remains is a Linux OS.
But, I'll try and have a go with 2 SSDs here and see what comes out of my copy experience with a RPi-4B.
Hello Klojum
LibreELEC = Linux + Kodi clear but, I thought it is a KODi Bug so I posted it there 2 Times but it seems noone has the Same Problem...
I only saw that behavior on x86 Hardware since KODi V18.
bpr323 you are Right! Same behavior Here.
I personaly don't use the terminal Nor the integrated Filemanager from KODi to moved Big Files. So this never happened to me before.
Just tried it on:
Intel NUC ( j3455 SATA SSD to nvme USB3 SSD)
PC Gigabyte mainboard i5 4460 (SATA SSD to SATA HD)
Acer Nitro Laptop i7 6700hq (USB3 Stick to NVME SSD)
ASRock j3455m (SATA HD to SATA HD)
In all Tests KODi was running but idle.
Makes No difference If it is USB, SATA or NVME.
But If I Copy over the Network (also from and to the Same PC), which is the way I Always use, everything is okay as Long as I don't start an Action within KODi (Grab EPG CPU load 36%, Update Database CPU load 55%, search for new Media etc) or open an Info Screen.
Regards
Nicolas