EINVAL: Invalid argument [open] ...not

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Posts: 1
Joined: 9 Apr 2026

BrendaEM

On FreeFileSync Linux, I have this error, when writing to an external drive.
EINVAL: Invalid argument [open]

The computer has been rebooted. The drive has been checked.
I've looked for hidden files, that might indicate it was open, but haven't found any.

BTW, thanks for FreeFileSync : )
Posts: 170
Joined: 5 Jan 2024

John1234

Hi,

What is the file system format on the external drive?

It's best if it were either ext4 or NTFS. If it's FAT32 that's probably your problem. Exfat should work too.

Here is a list of things to try.

linux error