Why do my files disappear on sd card?

I have a sm-t800 and running Lollipop 5.0.2. If i un-mount sd card then re-mount they show up, but if i click device storage, then go back to sd card their gone again.
Also why can't i write to sd card

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by dustin.koss
4 hours ago
Last post by howe.lorna
4 hours ago
Last post by kwilkinson
2 hours ago
Last post by murphy.judson
2 hours ago
Last post by rcummings
2 hours ago
Last post by eliza91
26 minutes ago
Last post by wrenner
1 hour ago
Last post by bernhard.elmore
2 hours ago
Last post by emcclure
1 hour ago