I am using latest 7 version of tiny core plus.
By default chromium store downloaded files in /home/tc/Downloads, which by default copied to Backup (is not good), and if i have 780 mb rootfs, i could not download large 2gb file.
To solve this problem i need create folder /mnt/sda1/downloads, change permission (user tc, group stuff), change download folder in chromium (/mnt/sda1/downloads).