Install problem

[Doug]

Trying to install Fedora 32 KDE on second hard drive. This drive has 
been partitioned with /dev/sdb1 formatted as NTFS, and /dev/sdb5 and 
/dev/sdb6
formatted as ext4.  The Fedora install disk says there is only 2.77MB 
available on the disk. What gives, and how do I fix it?

After mounting the disk partitions using PCLOS, I do a df -a and see this:

Filesystem      Size  Used Avail Use% Mounted on

/dev/sdb6        49G  180M   46G   1% 
/media/662eba9a-9b8f-41c3-83b9-ebe7a99a27c9
/dev/sdb1        51G    67M   51G   1% /media/094E20372CEB488B
/dev/sdb5        49G  180M   46G   1% 
/media/a0ba2017-3c90-4dfb-b946-f737050f63e7

Please advise--doug