Steam wont accept external SSD

I have 4 drives connected to my PC

My lsblk output is

NAME   SERIAL            SIZE MOUNTPOINTS
sda    WD-WCC6Y7NUJN54 931,5G /run/media/robin/336f7010-e954-48f4-9ce7-ec977a75787d
sdb    WD-WCC6Y1NC0LS3 931,5G /run/media/robin/3d00d2cc-77b3-40ce-89a0-f2f39ddb7924
sdc    S62BNZ0R428933W 465,8G /run/media/robin/SSD\x5cx5cx20External
sdd    S4CSNF0MC00821Y 931,5G  
├─sdd1                     2G /boot/efi
├─sdd2                     8G [SWAP]
└─sdd3                 921,5G /

My cat /etc/fstab output is

# UUID=bb9a66c6-b7d6-45fb-a98e-42f1307a8bdc LABEL=SSD\134x20Main
/dev/sdd3               /               ext4            rw,relatime     0 1

# UUID=299a6b63-4b99-4e39-9471-40f6928f8dd5 LABEL=SSD\134x20External
/dev/sdc                /run/media/robin/SSD\134x5cx20External  ext4            rw,nosuid,nodev,relatime,errors=remo
unt-ro  0 2

# UUID=3d00d2cc-77b3-40ce-89a0-f2f39ddb7924 LABEL=HDD\134x20Blau
/dev/sdb                /run/media/robin/3d00d2cc-77b3-40ce-89a0-f2f39ddb7924   ext4            rw,nosuid,nodev,rela
time,errors=remount-ro  0 2

# UUID=336f7010-e954-48f4-9ce7-ec977a75787d LABEL=HDD\134x20Rot
/dev/sda                /run/media/robin/336f7010-e954-48f4-9ce7-ec977a75787d   ext4            rw,nosuid,nodev,rela
time,errors=remount-ro  0 2

# UUID=8E99-2749
/dev/sdd1               /boot/efi       vfat            rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=asc
ii,shortname=mixed,utf8,errors=remount-ro       0 2

# UUID=b95c7752-2cb5-4ec2-923e-e8bb78d27a58
/dev/sdd2               none            swap            defaults        0 0

The problem is steam does accept my 2 HDDs (sda and sdb) and my Main drive (sdd) but not my secondary SSD (sdc)