The easiest way would be to recreate the file system:
sudo mkfs.ext3 /dev/sdb1
mke2fs is used to create an ext2, ext3, or ext4 filesystem, usually in a disk
partition. device is the special file corresponding to the device
(e.g /dev/hdXX). blocks-count is the number of blocks on the device. If omit‐
ted, mke2fs automagically figures the file system size. If called as mkfs.ext3
a journal is created as if the -j option was specified.
The defaults of the parameters for the newly created filesystem, if not over-
ridden by the options listed below, are controlled by the /etc/mke2fs.conf
configuration file. See the mke2fs.conf(5) manual page for more details.