Error with mtp connection between linux ubuntu and android

[fredo.faure]

Hello, i try a "Mirror" synchronization
from linux directory to a android directory,
and get the error:
---------------------
16:27:59 Info Comparison finished: 2 items found | Time elapsed: 00:00:00
16:28:03 Info Creating file "/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t1.pdf"
16:28:07 Error Cannot move file
"/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t1~a53d.ffs_tmp" to
"/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t1.pdf".
EIO: Erreur d'entrée/sortie [rename]
16:28:07 Info Creating file "/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t2.pdf"
16:28:11 Error Cannot move file
"/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t2~fca6.ffs_tmp" to
"/run/user/1001/gvfs/mtp:host=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace de stockage interne partagé/BOOX_pdf/essai/t2.pdf".
EIO: Erreur d'entrée/sortie [rename]

--------------------------------
However the following command works well in a linux terminal:
cp /run/user/1001/gvfs/mtp\:host\=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace\ de\ stockage\ interne\ partagé/BOOX_pdf/essai/t1.pdf /run/user/1001/gvfs/mtp\:host\=QUALCOMM_BENGAL-IDP__SN%3A5B883CD4_254253BA/Espace\ de\ stockage\ interne\ partagé/BOOX_pdf/essai/t2.pdf

-----
The difference in syntaxt is that i wrote mtp\:host instead of mtp:host
Can it explain the error, how to correct this please?
Thanks in advance,
Frédéric.

[Zenju]

The MTP device seems to have trouble with renaming. If you turn off menu->tools: "fail-safe file copy", the error probably won't occur. Ideally this setting should be moved to the folder pair level.

[fredo.faure]

I did this, and now it works fine. Thank you. It is a big risk to remove this temporary copy option?

[xCSxXenon]

Without that protection, FFS will delete the target file before writing the new file. if interrupted, you now have no copy on the target. You still have the copy on the source though.