However this requires a subscription to the Switch Online service, which Nintendo had reminded gamers that these cloud saves will be deleted if your subscription ends. This was revealed in an FAQ which did not mention if there would be a grace period in which your save files will be kept should you decide to renew. Thankfully thanks to the folks at IGN who reached out to Nintendo to clarify, it turns out that there will be a grace period of up to six months.
Nintendo told IGN, “If a Nintendo Switch Online membership expires, users won’t be able to access their Save Data Cloud backups. However, Nintendo will allow users who resubscribe within 180 days to access their previous Save Data Cloud backups.” This means that when your membership has been cancelled, your save data will be kept on Nintendo’s cloud for 180 days, so as long as you resubscribe within 180 days, you should be able to access those files, but if you don’t, then you can kiss your cloud saves goodbye.
That being said, Nintendo had also previously confirmed that not all games will support cloud saving.