I have most of my Steam Library on NTFS drives. I can mount, read and write in all. However, when Steam wants to update Steam Cloud, it fails and reports a write error.
I have installed ntfs-3g and use it as filesystem, as the wiki suggests. I have set the options as rw gid=100 uid=1000, but the error persists. I have changed ownership of the directory where the drives are mounted to my user and users. I have also run ntfsfix -d <<drive>> for all drives successfully
I really don’t know how to fix it that is not formatting the drives to ext4 (I don’t want to because I dual boot).
Here I add outputs that may be of value
How I have mounted my drives (sample)
fileSystems."/media/games_2" =
{ device = "/dev/disk/by-uuid/A21E31FE1E31CBD3";
fsType = "ntfs-3g";
options = [ "gid=100" "uid=1000" "rw" ];
};
Error logged by steam when ran through the terminal
src/clientdll/remotestoragefilesynccontext.cpp (951) : Assertion Failed: Failed to write file after download (2)
Output of cat ~/.steam/steam/logs/cloud_log.txt
[2025-10-13 15:39:55] [AppID 1761390] Starting sync (down,)
[2025-10-13 15:39:55] [AppID 1761390] AutoCloud failed to write session info to /media/games_1/SteamLibrary/steamapps/compatdata/1761390/pfx/drive_c/users/steamuser/Application Data/SEGA/Project DIVA MEGA39's/Steam/76561198118794736/steam_autocloud.vdf
[2025-10-13 15:39:55] [AppID 1761390] Attempting to sync from local change number '0' to global change number '2' (full)
[2025-10-13 15:39:55] [AppID 1761390] Need to download file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat
[2025-10-13 15:39:55] [AppID 1761390] Need to download file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat
[2025-10-13 15:39:56] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat' from host 'steamcloud-saopaulo.storage.googleapis.com', path /F0/F5/72/09/1761390/3CC_8_27EA7C27_19C45_1.dat, beginning. . .
[2025-10-13 15:39:56] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat' from host 'steamcloud-saopaulo.storage.googleapis.com', path /F0/F5/72/09/1761390/350_6_3D93F72A_73EE5_2.dat, beginning. . .
[2025-10-13 15:39:56] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat' from host 'steamcloud-saopaulo.storage.googleapis.com' - Success.
[2025-10-13 15:39:56] [AppID 1761390] Downloaded file could not be written - error 2, internal path 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat', file path '/media/games_1/SteamLibrary/steamapps/compatdata/1761390/pfx/drive_c/users/steamuser/Application Data/SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat'
[2025-10-13 15:39:56] [AppID 1761390] Download I/O Operation Failed for file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat
[2025-10-13 15:39:56] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat' from host 'steamcloud-saopaulo.storage.googleapis.com' - Success.
[2025-10-13 15:39:56] [AppID 1761390] Downloaded file could not be written - error 2, internal path 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat', file path '/media/games_1/SteamLibrary/steamapps/compatdata/1761390/pfx/drive_c/users/steamuser/Application Data/SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat'
[2025-10-13 15:39:56] [AppID 1761390] Download I/O Operation Failed for file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat
[2025-10-13 15:39:56] [AppID 1761390] Download complete, result I/O Operation Failed
[2025-10-13 15:39:56] [AppID 1761390] YldWriteCacheDirectoryToFile - saved to '/home/veltair/.local/share/Steam/userdata/158529008/1761390/remotecache.vdf'
[2025-10-13 15:40:49] [AppID 1761390] Starting sync (down,)
[2025-10-13 15:40:49] [AppID 1761390] AutoCloud failed to write session info to /media/games_1/SteamLibrary/steamapps/compatdata/1761390/pfx/drive_c/users/steamuser/Application Data/SEGA/Project DIVA MEGA39's/Steam/76561198118794736/steam_autocloud.vdf
[2025-10-13 15:40:49] [AppID 1761390] Attempting to sync from local change number '0' to global change number '2' (full)
[2025-10-13 15:40:49] [AppID 1761390] Need to download file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat
[2025-10-13 15:40:49] [AppID 1761390] Need to download file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat
[2025-10-13 15:40:49] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat' from host 'steamcloud-saopaulo.storage.googleapis.com', path /F0/F5/72/09/1761390/3CC_8_27EA7C27_19C45_1.dat, beginning. . .
[2025-10-13 15:40:49] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat' from host 'steamcloud-saopaulo.storage.googleapis.com', path /F0/F5/72/09/1761390/350_6_3D93F72A_73EE5_2.dat, beginning. . .
[2025-10-13 15:40:50] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat' from host 'steamcloud-saopaulo.storage.googleapis.com' - Success.
[2025-10-13 15:40:50] [AppID 1761390] Downloaded file could not be written - error 2, internal path 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat', file path '/media/games_1/SteamLibrary/steamapps/compatdata/1761390/pfx/drive_c/users/steamuser/Application Data/SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat'
[2025-10-13 15:40:50] [AppID 1761390] Download I/O Operation Failed for file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/288404204e3d452229308317344a285d.dat
[2025-10-13 15:40:57] [AppID 1761390] HTTP download for file 'SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat' from host 'steamcloud-saopaulo.storage.googleapis.com' - Timed out.
[2025-10-13 15:40:57] [AppID 1761390] Download Timeout for file SEGA/Project DIVA MEGA39's/Steam/76561198118794736/36bcbb801f5052739af8220c6ea51434.dat
[2025-10-13 15:40:57] [AppID 1761390] Download complete, result Timeout
[2025-10-13 15:40:57] [AppID 1761390] YldWriteCacheDirectoryToFile - saved to '/home/veltair/.local/share/Steam/userdata/158529008/1761390/remotecache.vdf'
Thank you for your time