Create the copy
Open My List and choose Create backup. Copy the complete text from the output box and save it somewhere you can find on the other device. Copying only part of the text can make it unreadable.
Merge, do not replace
Paste the complete backup into Restore backup and choose Merge backup. Recognized titles are added without duplicating saved entries. A valid imported checkpoint is added when that series does not already have one in the destination browser.
Read the result
The status distinguishes added entries from skipped ones. A title outside the current catalog or an unrecognized episode cannot be restored as if it were valid. A backup from another brand is not a PrimeFlix backup.
Keep a recent copy
Create another backup after a large round of list changes. The earlier copy does not update itself, and clearing local browser data does not update text you stored elsewhere.