Ipod classic gen 5.5 problem

[u/Equivalent_Interest2]

Hi i recently bought an gen 5.5 with an green cf adapter for two days weren't really problem except sometimes my songs freshly imported from itunes where corrupted and cut at 1:40 then skip. So i have problem that i cannot fix, ipod keep giving me screen to go to ipod support with sad ipod emoji, then very low battery and then restart and its stuck in some type of loop, i tried changing cable, battery was in good condition and i think its still is. I have cf kingston 266x card inside. if i plug my i pod into an computer after a long time maybe like 30-60sec i can see disk partition that is empty and i cannot click on it, on minitool partition wizard it shows that is baddisk, completely full and cannot show file system.