Do all major services delete data from servers?

Question

Data storage

Not long ago, the topic was discussed (in the spirit of "a little paronoia" =)))). I know that vk and facebook do not delete photos from the servers themselves (and all messages, posts, like that too). To avoid fragmentation. (Remote docs/messages will be physically stored for at least 10 years, at least for life) I'm curious, do all major services do this? For example, Mail.ru, Mamba, Clouds (to store their files) also do not delete anything at all (physically) xD?

Answer 1

"Fragmentation" is an excuse that was invented in VK
No fragmentation has anything to do with the real state of affairs now.
Are the data actually deleted, in reality, several people can know
And they obviously will not tell you the truth

facebook not deleting photos

and after the GDPR - are required

Answer 2

. To avoid defragmentation

To avoid fragmentation.
That's what everyone does. Data will be deleted one way or another when migrating to new storages