On this device, no account: kept on this device until you clear your browser data; download the file to keep it
for good.
35-day sandbox, signed in: your books are kept for 35 days after each save, on any device.
Resident, £39 a year: kept until you delete it, on any device.
Resident Pro, £199 a year: manage a practice's clients — file VAT, Income Tax Self Assessment and micro-entity
accounts to HMRC and Companies House on their behalf.