Enhancement request to synchronize a few days older mails additionally

Regarding Verse iOS, synchronized period is set with "Days to Sync" in Verse iOS Settings in advance, and the setting has some defined periods, "1 day", "3 days", "1 week", "2 weeks", 1 month", "3 months", "6 months", "1 year" and "unlimited".

When a user wants to see older emails than current period, he needs to change the setting.

For example, if he changes the setting from "1 year" to "unlimited", an additional large number of mails will be synced and it will cause to increase storage usage.

Customer want to avoid this scenario and he wants to see only a few days(weeks) older mails additionally than current period.

For example, when the setting is "1 year", he wants to sync 5 days older mails additionally instead of changing the setting to "unlimited".

Microsoft Outlook has similar function, "load more conversations".