Hi, @magnusja
Libaums version 0.7.3

Hardware devices:

• usb device 1: SanDisk dual-drive 128Gb with Fat32, 32/64 Kb cluster size;
• usb device 2: JetFlash 8Gb with Fat32, 32/4 Kb cluster size;
• android version 9(Samsung Galaxy S10e)/8(Xiaomi Redmi 5 Plus)

Problem

I try to copy about 1000 mixed size/type files (total size 2 Gb).

Expected behavior

Files were copied correctly.

Actual behavior

java.io.IOException: Could not write to device, result == -1 errno 0 null

Stacktrace of Excpetion

Code where problem occurs

UsbFileOutputStream.write(bytes);

Any hints!

Thanks a lot!