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This file is transferred to the destination 3DS during a [[System Transfer]], the source 3DS then uses a new file retrieved from the shop server. This keyY is the console-unique portion of these 3 keyslots. All of the data under [[SD Filesystem|sdmc/Nintendo 3DS/<ID0>/<ID1>]] and [[Flash Filesystem|nand/data/<ID0>]] use these console-unique keyslots.

This file is transferred to the destination 3DS during a [[System Transfer]]. The keyY high u64 loaded from movable.sed, is a counter which is incremented on the source 3DS during a [[System Transfer]]. This keyY is the console-unique portion of these 3 keyslots. All of the data under [[SD Filesystem|sdmc/Nintendo 3DS/<ID0>/<ID1>]] and [[Flash Filesystem|nand/data/<ID0>]] use these console-unique keyslots.

Movable.sed always exists on retail, however if this file doesn't exist the system will fall-back to using a console-unique keyY already in [[PSPXI:GetLocalFriendCodeSeed|memory]], with the last 8-bytes being loaded from the 8-bytes following that u64. Therefore, movable.sed presumably doesn't exist on development units.

Movable.sed always exists on retail, however if this file doesn't exist the system will fall-back to using a console-unique keyY already in [[PSPXI:GetLocalFriendCodeSeed|memory]], with the last 8-bytes being loaded from the 8-bytes following that u64. Therefore, movable.sed presumably doesn't exist on development units.

The keyY is hashed with SHA256, the first 0x10-bytes from the hash is used for ID0 in [[SD Filesystem|sdmc/Nintendo 3DS/<ID0>/<ID1>]] and [[Flash Filesystem|nand/data/<ID0>]].

The keyY is hashed with SHA256, the first 0x10-bytes from the hash is used for ID0 in [[SD Filesystem|sdmc/Nintendo 3DS/<ID0>/<ID1>]] and [[Flash Filesystem|nand/data/<ID0>]].