aufbewahren
to store
To keep something in a particular place for later use, often to protect it from loss or damage.
Wichtige Dokumente sollte man an einem sicheren Ort aufbewahren.
Important documents should be stored in a safe place.

to store / keep
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to store
To keep something in a particular place for later use, often to protect it from loss or damage.
Wichtige Dokumente sollte man an einem sicheren Ort aufbewahren.
Important documents should be stored in a safe place.

'Aufbewahren' (to store/keep) is a separable verb. The prefix 'auf-' comes at the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together, with 'zu' placed between the parts.
Ich bewahre meine alten Fotos in einer Kiste auf.
I keep my old photos in a box.
When you store something physical, the place is often mentioned. Typical formulations are 'im Kühlschrank aufbewahren' (to store in the refrigerator), 'an einem kühlen Ort aufbewahren' (to store in a cool place), or 'im Tresor aufbewahren' (to store in a safe).
Milchprodukte müssen Sie immer im Kühlschrank aufbewahren.
You must always store dairy products in the refrigerator.
You can recognize this figurative meaning from the object of the verb. If it is something immaterial like 'eine Erinnerung' (a memory), 'ein Geheimnis' (a secret), or 'ein Gefühl' (a feeling), this meaning is intended.
Er hat ihr Geheimnis viele Jahre lang für sich aufbewahrt.
He kept her secret to himself for many years.
to forget
'vergessen' and 'aufbewahren' are opposites here when talking about memories, feelings, or secrets. 'vergessen' means that something is no longer in your memory. In this context, 'aufbewahren' means that you keep something inside and do not lose it. For things like keys or documents, 'aufbewahren' can also be used physically, but the contrast with 'vergessen' fits especially well with memories.

Die Erinnerung an den ersten Schultag bewahrt er bis heute auf.
He still keeps the memory of his first day of school to this day.
Nach so vielen Jahren hat sie den Namen des Lehrers vergessen.
After so many years, she has forgotten the teacher's name.